VarChange2.java

package java02_basic.ref;

public class VarChange2 {

  public static void main(String[] args) {
    Data dataA = new Data();
    dataA.value = 10;
    Data dataB = dataA;

    System.out.println("dataA 참조값 = " + dataA);
    System.out.println("dataB 참조값 = " + dataB);
    System.out.println("dataA.value = " + dataA.value);
    System.out.println("dataB.value = " + dataB.value);

    // dataA 변경
    dataA.value = 20;
    System.out.println("\n변경 dataA.value = 20");
    System.out.println("dataA.value = " + dataA.value); // 20
    System.out.println("dataB.value = " + dataB.value); // 20

    // dataB 변경
    dataB.value = 30;
    System.out.println("\n변경 dataB.value = 30");
    System.out.println("dataA.value = " + dataA.value); // 30
    System.out.println("dataB.value = " + dataB.value); // 30

  }
}