看着有点恼火，你说为毛JAVA不用C或C++一样的指针传递呢？

C#和JAVA都号称取消了指针，但用户在编程时，不一样面对和学C/C++一样的变量及变量指针地址的问题么？

代码分三个：

1 public class TempTest{ 2     private void test1(int a) { 3         a++; 4         System.out.println("The char A in test1 method value is :" + a); 5     } 6  7     public static void main(String[] args) { 8         TempTest t = new TempTest(); 9         int a = 3;10         t.test1(a);11         System.out.println("The char A in main method value is :" + a);12     }13 }

1 public class TempTest1 { 2     private void test1(A a) { 3         a.age = 20; 4         System.out.println("The age in test1 method value is :" + a.age); 5     } 6  7     public static void main(String[] args) { 8         TempTest1 t = new TempTest1(); 9         A a = new A();10         a.age = 10;11         t.test1(a);12         System.out.println("The age in main method value is :" + a.age);13     }14 }15 class A {16     public int age = 0;17 }

 

1 public class TempTest2 { 2     private void test2(A a) { 3         a = new A(); 4         a.age = 20; 5         System.out.println("The age in test2 method value is :" + a.age); 6     } 7  8     public static void main(String[] args) { 9         TempTest2 t = new TempTest2();10         A a = new A();11         a.age = 10;12         t.test2(a);13         System.out.println("The age in main method value is :" + a.age);14     }15 }16 class A {17     public int age = 0;18 }

 

结果分三段：