Java中的参数传递与对象Clone详细讲解

class Obj{ 
    String str = "init value"; 
    public String toString(){ 
        return str; 
    } 
} 
public class ObjRef{ 
    Obj aObj = new Obj(); 
    int aInt = 11; 
    public void changeObj(Obj inObj){ 
        inObj.str = "changed value"; 
    } 
    public void changePri(int inInt){ 
        inInt = 22; 
    } 
    public static void main(String[] args) 
    { 
        ObjRef oRef = new ObjRef(); 
         
        System.out.println("Before call changeObj() method: " + oRef.aObj); 
        oRef.changeObj(oRef.aObj); 
        System.out.println("After call changeObj() method: " + oRef.aObj); 

        System.out.println("==================Print Primtive================="); 
        System.out.println("Before call changePri() method: " + oRef.aInt); 
        oRef.changePri(oRef.aInt); 
        System.out.println("After call changePri() method: " + oRef.aInt); 

    } 
}

class C implements Clonable{

    private int cInt;

     public C(int ii) { cInt = ii; }

     public void doubleValue(int ii) { cInt *= 2; }

     public String toString(){ return Integer.toString(cInt); }

     public Object clone(){ 
           C o = null; 
          try{ 
                o = (C)super.clone(); 
              }catch(CloneNotSupportedException e){ 
                           e.printStackTrace(); 
             } 
            return o; 
         } 
} 

class A implements Clonable{

      private int aInt;

      C cc = new C(123);

      public Object clone(){ 
      A o = null; 
        try{ 
               o = (A)super.clone(); 
         }catch(CloneNotSupportedException e){ 
             e.printStackTrace(); 
        } 
          o.cc = (C)cc.clone(); 
          return o; 
} 
调用时：

    A aa = new A();

    A bb = (A) aa.clone();

此时aa和bb对象中的内容就完全相同了!
}