[java] Question about passing info between classes.

public class ClassOne {   public static void main(String[] args) {      ClassTwo two = new ClassTwo();            // Option 1 - Static      System.out.println(ClassThree.getValueStatic());      // Option 2 - By reference      ClassThree three = two.getClassThree();      System.out.println(three.getValue());      // Option 3 - Static by name      System.out.println(ClassThree.value();   }}public class ClassTwo {   private ClassThree three;   public ClassTwo() {      three = new ClassThree();      three.setValue(100);   }      public getClassThree() {      return three;   } }public class ClassThree {   public static int value = 0;   public ClassThree() {}   public void setValue(int value) {      this.value = value;   }   public int getValue(){      return value;   }   public static int getValueStatic() {      return value;   }}