When false is true

While trying to explain reflection to one my young friend, I finally ended up writing this code:

package aminur.test.mutate;

import java.lang.reflect.Field;

public class MutableString {

	public static void main(String[] argv) {
		mutate();
		System.out.println("TRUE".equals("FALSE"));
	}

	public static void mutate() {
		try {
			String t = "TRUE";
			String f = "FALSE";
			Field val = String.class.getDeclaredField("value");
			Field count = String.class.getDeclaredField("count");
			Field off = String.class.getDeclaredField("offset");
			val.setAccessible(true);
			count.setAccessible(true);
			off.setAccessible(true);
			

			count.set(t, f.length());
			val.set(t, f.toCharArray());
			off.set(f, off.getInt(f));
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}

This won’t work in 1.3/.4 but will work in higher/lower version of JDK

The bug #5044412 fix(?) may disallow setting of value of fields.