提取Java方法中引用的实例变量

Question

I have a class like below

class A{
    private var1, var2;

    public void methodA(){
        sout(var1);
    }
    public void methodB(){
        sout(var1);
        sout(var2);
    }
}

Here in that code snippet I have class with two instance variables var1 , var2 and two methods methodA , methodB . var1 is referenced in both methodA and methodB . How can I extract this information from a java class?

Answer 1

You can use this library: JavaParser Core

    JavaAnalyzer jpa = new JavaAnalyzer(this, "A.java");

    AtomicBoolean var1IsReferencedInMethodA = new AtomicBoolean(false);

    jpa.visit((MethodDeclaration methodDeclaration) -> {
        var1IsReferencedInMethodA.setTrueWhen(methodDeclaration.getName().equals("methodA")
                && (methodDeclaration.getBody().getStmts().get(0).toString().equals("var1")));
    });

    System.out.println("var1 is referenced in methodA(): " + var1IsReferencedInMethodA);