If the following code appears in a different class, what will be the output of this code?

Look at the following class definition: public class Testclass { private int num; public TestClass(int initialNum) { num = initialNum; } public void setNumToZero() { num = 0; } public int getNum() { return num; } } If the following code appears in a different class, what will be the output of this code? Testclass one = new TestClass(300); Testclass two = new Testclass (one.getNum()); TestClass three = one; one.setNumToZero(); System.out.println(one.getNum() + + two.getNum() + three.getNum()); 000 0 300 0 300 300 300 0 300 300