OverrideOnLocalVar

package core.src.thread;

import java.util.Arrays;

public class Thread {

    public static void main(String[] args) {
        A a=new A();
        new java.lang.Thread(new RunA(a)).start();
        new java.lang.Thread(new RunB(a)).start();
    }

}

class RunA implements Runnable{

    private final A a;

    RunA(A a){
        this.a=a;
    }

    @Override
    public void run() {
        while(true) {
            a.print(java.lang.Thread.currentThread().getName());

            Arrays.stream(java.lang.Thread.currentThread().getStackTrace()).forEach(System.out::println);
            try {
                java.lang.Thread.sleep(5000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}


class RunB implements Runnable{

    private final A a;

    RunB(A a){
        this.a=a;
    }

    @Override
    public void run() {
        while (true) {
            a.print(java.lang.Thread.currentThread().getName());
            Arrays.stream(java.lang.Thread.currentThread().getStackTrace()).forEach(System.out::println);
            try {
                java.lang.Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

class A{

    void print(String a){
        // Will this object get overridden by another Thread B, if A leaves control in the middle?
        Object a=new Object();
        // add another ten lines of code where it is possible that thread A might give up control
        // .... Current Thread leaves control ....
        System.out.println("Hello from "+a);
    }

}