TreePrinter

To add this library to your project, click on JitPack badge. You can also manually add Jar file, you can find jar file in release section.

Demo: I have created two classes for printing FilesStructure.

1.FileTreePrinter

publicclassMain {
publicstaticvoidmain(String[] args) {
Filefile=newFile("./src");
FileTreePrintertreePrinter=newFileTreePrinter(file);
treePrinter.visitAndPrint();
// or// StringBuilder sb=treePrinter.visitAndReturn();// sout(sb);
}
}

This code will produce below output.

src
├─main
│ ├─java
│ │ └─com
│ │ ├─demo
│ │ │ └─Main.java
│ │ └─devik
│ │ ├─Color.java
│ │ ├─file
│ │ │ ├─FileTreePrinter.java
│ │ │ └─FileTreePrinterColored.java
│ │ └─TreePrinter.java
│ └─resources
└─test
└─java

2.FileTreePrinterColored

publicclassMain {
publicstaticvoidmain(String[] args) {
Filefile=newFile("./src");
FileTreePrinterColoredtreePrinter=newFileTreePrinterColored(file);
treePrinter.visitAndPrint();
// or// StringBuilder sb=treePrinter.visitAndReturn();// System.out.println(sb);
}
}

This code will produce below output.

Also in case of FileTreePrinterColored you can set custom colors.

publicclassMain {
publicstaticvoidmain(String[] args) {
Filefile=newFile("./src");
FileTreePrinterColoredtreePrinter=newFileTreePrinterColored(file);
treePrinter.setFolderColor(Color.RED);
treePrinter.setHiddenFolderColor(Color);
treePrinter.setExecutableFileColor(Color);
treePrinter.setNonExecutableFileColor(Color);
//ortreePrinter.setNonExecutableFileColor(Color.valueOf("color asci"));
treePrinter.visitAndPrint();
// or// StringBuilder sb=treePrinter.visitAndReturn();// System.out.println(sb);
}
}

If you want to print other than file tree than you can use TreePrinter abstract class. In that case you need to implement three methods.

Objectobj;
TreePrintertreePrinter=newTreePrinter(obj) {
@OverridepublicObject[] getChild(Objectobj) {
returnnewObject[0];
}
@OverridepublicStringgetValue(Objectobj) {
returnnull;
}
@OverridepublicbooleanisLeaf(Objectobj) {
returnfalse;
}
};
// Here obj is the root of TreeStructure.

for ie. if you want to print BinaryTree than you can do something like below...

Objectobj; //here obj is root of Binary treeTreePrintertreePrinter=newTreePrinter(obj) {
@OverridepublicObject[] getChild(Objectobj) {
Nodenode=(Node)obj;
returnnewObject[]{node.left,node.right};
}
@OverridepublicStringgetValue(Objectobj) {
return ((Node)obj).getValue();
}
@OverridepublicbooleanisLeaf(Objectobj) {
Nodenode=(Node)obj;
returnnode.left==null && node.right==null;
}
};
// Here obj is the root of TreeStructure.