VariableDeclarationFragment node resolveBindind() returns null in eclipse/jdt/ast

Question

I\'m trying to try out eclipse jdt/ast following this article.

This is the java code as an input:

class Hello
{
    int hello()
    {
        int a =         


        

Answer 1

I tried solving this using the following piece of code

protected static CompilationUnit parseStatements(String source) {
    ASTParser parser = ASTParser.newParser(AST.JLS8);
       parser.setSource(source.toCharArray());
    parser.setKind(ASTParser.K_COMPILATION_UNIT);
    parser.setResolveBindings(true);

    parser.setEnvironment( // apply classpath
            new String[] { "//home//user//Projects//SmartCopy//ASTParser_Test//bin" }, //
            null, null, true);
    parser.setUnitName("any_name");
    final CompilationUnit cu = (CompilationUnit) parser.createAST(null);
    return cu;

}


static void newcheckVariableDeclaration(){
    String source ="package javaproject;" // package for all classes
            + "class Dummy {"
            + "int j;" //
            + "   public void add(){"
            + "int x=0,y=0;"
            + "j=x+y;\n" //
            + "   }" //
            + "}"; 

    final CompilationUnit root = parseStatements(source);
    root.accept(new ASTVisitor() {
        public boolean visit(SimpleName node) {
            System.out.println(node.toString());
            if(node.resolveBinding() == null){
                System.out.println(node.toString()+" is not declared");
            }
            else{
                System.out.println(node.toString() + " is declared");
            }
            System.out.println();
            return true;
        }
    });