/*
 * Created on 2004-4-6
 *  2004 japp.org All rights reserved
 */
package org.japp.study.syntax;

/**
 * @author <a href="mailto:wanglin@japp.org">wang lin</a>
 */
public class PassByValue {

  public void swapObj(Obj t) {
    System.out.println("swapObj(Obj t)=>  size: " + t.getSize() + ", name:" + t.getName());
    Obj t2 = new Obj();
    t2.setName("B");
    t2.setSize(100);
    t = t2;
    System.out.println("swapObj(Obj t)=>  size: " + t.getSize() + ", name:" + t.getName());
  }
  
  public void changeObj(Obj t) {
    t.setName("c");
    t.setSize(99);
  }
  public static void main(String[] args) {
    PassByValue pbv = new PassByValue();
    Obj obj = new Obj();
    pbv.swapObj(obj);
    System.out.println("main()=>  size: " + obj.getSize() + ", name:" + obj.getName());
    pbv.changeObj(obj);
    System.out.println("main()=>  size: " + obj.getSize() + ", name:" + obj.getName());
  }
}

class Obj {
  private String name = "A";
  private int size = 0;

  /**
   * @return
   */
  public String getName() {
    return name;
  }

  /**
   * @param name
   */
  public void setName(String name) {
    this.name = name;
  }

  /**
   * @return
   */
  public int getSize() {
    return size;
  }

  /**
   * @param i
   */
  public void setSize(int i) {
    size = i;
  }

}

/**
 * @author <a href="mailto:wanglin@japp.org">wang lin</a>
 */
public class PassByValue2 {

  public static void main(String[] args) {
    String b = "hi";
    String a = "hello";
    a = b;
    b = "love";
    System.out.println("a: " + a);
  }
}

public class PassByValue2 {

  public static void main(String[] args) {
    String b = "hi";
    String a = "hello";
    a = b;
    b = "love";
    System.out.println("a: " + a);
  }
}

public class SwapTest {  
  public static void swapObj(Obj key3, Obj key4) {
    Obj temp = key3;
    key3 = key4;
    key4 = temp;  
  }
    
    public static void main(String[] args) {       
      Obj key1 = new Obj("A", 100);
  Obj key2 = new Obj("B", 200);    
  SwapTest.swapObj(key1, key2);    
      System.out.println("main()=>  obj1: " + key1);
  System.out.println("main()=>  obj2: " + key2);  
    }
}

class Obj {  
  private String name;  
  private int size;  
    
  public Obj(String n, int s){
    name = n;
    size = s;
  }
  
  public String toString(){
    return name + " " + size;
  }
}