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Mini-Java Compiler

An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.

Features:

  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS

Build

To build this project, use the following command at the root of this repository:

javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .

Run

To typecheck and compile a Mini-Java source file a.java to MIPS, use:

java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.

Judge

To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.

It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.

Note: Checking MIPS assembly file is not supported yet.

About

An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS

Resources

Readme
GPL-3.0 license
Activity

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1 star

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
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Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
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0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
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Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
Repository files navigation
Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
Repository files navigation
Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
Repository files navigation
Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
Repository files navigation
Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - benkerd22/MiniJavaCompiler: An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS · GitHub
Skip to content
BranchesTags
Repository files navigation
Mini-Java Compiler
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS.
Features:
  • typecheck
  • compile Mini-Java to sPiglet
  • compile sPiglet to Kanga
  • compile Kanga to MIPS
Build
To build this project, use the following command at the root of this repository:
javac -d bin -sourcepath src src/Main.java

the executable files will be stored in bin .
Run
To typecheck and compile a Mini-Java source file a.java to MIPS, use:
java -cp bin Main a.java

If typecheck succeeds, a MIPS assembly file a.s (with the same name) will be created at the same directory. Otherwise the program will report the errors and terminate.
Judge
To check the correctness, just click and run the judge/judge.bat in Windows. It will go through every .java file in the sample directory, and check if the output files have the same behaviour(output) as the origin Mini-Java source file.
It requires the sPiglet Parser judge/spp.jar , the Piglet Interpreter judge/pgi.jar and the Kanga Interpreter judge/kgi.jar.
Note: Checking MIPS assembly file is not supported yet.
About
An implementation of UCLA CS 132 Project to compile Mini-Java to MIPS
Resources
Readme
GPL-3.0 license
Activity
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages