Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.lang.reflect.Field;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String[] args) throws Exception {
        Set<String> set = new HashSet<String>();
        String str = "java2s.com";
        set.add(str);

        Field stringValue = String.class.getDeclaredField("value");
        stringValue.setAccessible(true);
        stringValue.set(str, str.toUpperCase().toCharArray());

        System.out.println("New value: " + str);

        String copy = new String(str); // force a copy
        System.out.println("Contains orig: " + set.contains(str));
        System.out.println("Contains copy: " + set.contains(copy));
    }

}