HelloWorld/TextUI.java at master · RayArias/HelloWorld · GitHub

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// Class TextUI for program HelloWorld
// version 1.01.01-delta(rc)-Model T
// by Ray Arias, 31 August 2022

// subpackage: TextUI, version 1.01.01-delta(rc)-Model T
// semantic version 1.1.1-rc

importjava.util.Scanner;

/* This is a class of static methods for
 * obtaining user input, displaying out-
 * put, and converting one datatype to
 * another.
 */
publicclassTextUI {

// Creates and initializes a Scanner
// object in from java.init.Scanner
// and returns its reference.
publicstaticScanneropenUI() {
Scannerresult = newScanner(System.in);
returnresult;
 }

// Reads a String of input from the user
// using the Scanner object and returns
// it.
publicstaticStringreadln(Scannerscanner) {
Stringresult = scanner.nextLine();
returnresult;
 }

// Reads a double from the user using
// the Scanner object and returns it.
publicstaticdoublereaddbl(Scannerscanner) {
doubleresult = scanner.nextDouble();
scanner.nextLine();
returnresult;
 }

// Reads an int from the user using
// the Scanner object and returns it.
publicstaticintreadint(Scannerscanner) {
intresult = scanner.nextInt();
scanner.nextLine();
returnresult;
 }

// Closes the Scanner object.
publicstaticvoidcloseUI(Scannerscanner) {
scanner.close();
 }

// Uses the above methods to quickly
// create an instance of Scanner
// class, use it to read a line of
// user input, close the Scanner in-
// stance, and return the input as a
// String.
publicstaticStringquickReadln() {
Scannerscanner = TextUI.openUI();
Stringresult = TextUI.readln(scanner);
TextUI.closeUI(scanner);
returnresult;
 } // THIS METHOD NEEDS FIXING

// Sends characters to the console to
// clear the screen.
publicstaticvoidclrscn() {
TextUI.display("\033[H");
TextUI.display("\033[2J");
 }

// This method returns the numerical
// value of a char as an int.
publicstaticintchar2int(charc) {
returnCharacter.getNumericValue(c);
 }

// This method returns the ANSI char
// associated with the int given as a
// parameter.
publicstaticcharchr(inti) {
return (char) i;
 }

// Displays char (no newline, unless)
// c is '\n'.
publicstaticvoidchr(charc) {
System.out.print(c);
 }

// Displays escape codes by passing
// only the character associated with
// them without the backward slash be-
// fore it.
publicstaticvoidescchr(charc) {
charcc = c;
switch (cc) {

case'\\':
System.out.print('\\');
break;

case'\"':
System.out.print('\"');
break;

case'\'':
System.out.print('\'');
break;

case'n':
System.out.print('\n');
break;

case't':
System.out.print('\t');
break;

case'r':
System.out.print('\r');
break;

case'b':
System.out.print('\b');
break;

case'f':
System.out.print('\f');
break;
 }
 }

// Display newline
publicstaticvoidnewln() {
System.out.println();
 }

// Displays String specified in
// parameter without going to a
// new line at the end.
publicstaticvoiddisplay(Stringtext) {
System.out.print(text);
 }

// Displays int specified in
// parameter without going to a
// new line at the end.
publicstaticvoiddisplay(inti) {
System.out.print(i);
 }

// Displays double specified in
// parameter without going to a
// new line at the end.
publicstaticvoiddisplay(doubled) {
System.out.print(d);
 }

// Displays String specified in
// patameter and then go to a
// new line afterward.
publicstaticvoiddisplayln(Stringtext) {
System.out.println(text);
 }

// Displays int specified in
// patameter and then go to a
// new line afterward.
publicstaticvoiddisplayln(inti) {
System.out.println(i);
 }

// Displays double specified in
// patameter and then go to a
// new line afterward.
publicstaticvoiddisplayln(doubled) {
System.out.println(d);
 }

// Displays an int and a String in
// the format expressed in the first
// String.
publicstaticvoiddispf(Stringformat, intn, Stringdescription) {
System.out.printf(format, n, description);
 }

// Extracts the user's choice as the
// first character in the String typed
// in by the user.
publicstaticcharuserChoice(StringinputString) {
charresult = inputString.toUpperCase().charAt(0);
returnresult;
 }

}