/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.lang.reflect.Field;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Field fValue = null;
		for (Field f: String.class.getDeclaredFields()) {
			if (f.getName().equals("value")) {
				fValue = f;
			}
		}
		char[] text = new char[10];
        Arrays.fill(text, 'a');
        String s1 = new String(text);
        String s2 = s1.substring(1);
        fValue.setAccessible(true);
        text = (char[]) fValue.get(s2);
        Arrays.fill(text, 'z');
        System.out.println(s1);
	}
}

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