package mthread;

public class ThreadJoinCalcTanx {

private double sin45;

private double cos45;

public static void main(String[] args) {

final ThreadJoinCalcTanx obj = new ThreadJoinCalcTanx();

Runnable sin45r = new Runnable() {

@Override

public void run() {

obj.sin45 = Math.sin(Math.PI / 4);

}

};

Thread sin45t = new Thread(sin45r);

sin45t.start();

Runnable cos45r = new Runnable() {

@Override

public void run() {

obj.cos45 = Math.cos(Math.PI / 4);

}

};

Thread cos45t = new Thread(cos45r);

cos45t.start();

try {

sin45t.join();

cos45t.join();

} catch (InterruptedException e) {

e.printStackTrace();

}

double tan45 = Math.round(obj.sin45 / obj.cos45);

System.out.println("Tan45: " + tan45); // Nan:0.0 / 0.0;Infinity:5.0 /

// 0.0

}

}