passtest.java

来自「java（sl275课程习题解module1-module3共7道习题的题目以及」· Java 代码 · 共 39 行

public class PassTest {

  // Methods to change the current values
  public static void changeInt(int value) {
    value = 55;
  }
  public static void changeObjectRef(MyDate ref) {
    ref = new MyDate(1, 1, 2000);
  }
  public static void changeObjectAttr(MyDate ref) {
    ref.setDay(4);
  }

  public static void main(String args[]) {
    MyDate date;
    int val;

    // Assign the int 
    val = 11;
    // Try to change it
    changeInt(val);
    // What is the current value?
    System.out.println("Int value is: " + val);

    // Assign the date
    date = new MyDate(22, 7, 1964);
    // Try to change it
    changeObjectRef(date);
    // What is the current value?
    date.print();

    // Now change the day attribute
    // through the object reference
    changeObjectAttr(date);
    // What is the current value?
    date.print();
  }
}