CODE EXAMPLE FOR JAVA

javaparser

public static void main(String[] args) throws Exception {
    // creates the compilation unit
    CompilationUnit cu = createCU();

    // prints the created compilation unit
    System.out.println(cu.toString());
}

/**
 * creates the compilation unit
 */
private static CompilationUnit createCU() {
    CompilationUnit cu = new CompilationUnit();
    // set the package
    cu.setPakage(new PackageDeclaration(ASTHelper.createNameExpr("java.parser.test")));

    // create the type declaration 
    ClassOrInterfaceDeclaration type = new ClassOrInterfaceDeclaration(ModifierSet.PUBLIC, false, "GeneratedClass");
    ASTHelper.addTypeDeclaration(cu, type);

    // create a method
    MethodDeclaration method = new MethodDeclaration(ModifierSet.PUBLIC, ASTHelper.VOID_TYPE, "main");
    method.setModifiers(ModifierSet.addModifier(method.getModifiers(), ModifierSet.STATIC));
    ASTHelper.addMember(type, method);

    // add a parameter to the method
    Parameter param = ASTHelper.createParameter(ASTHelper.createReferenceType("String", 0), "args");
    param.setVarArgs(true);
    ASTHelper.addParameter(method, param);

    // add a body to the method
    BlockStmt block = new BlockStmt();
    method.setBody(block);

    // add a statement do the method body
    NameExpr clazz = new NameExpr("System");
    FieldAccessExpr field = new FieldAccessExpr(clazz, "out");
    MethodCallExpr call = new MethodCallExpr(field, "println");
    ASTHelper.addArgument(call, new StringLiteralExpr("Hello World!"));
    ASTHelper.addStmt(block, call);

    return cu;
}