值传递和引用传递

在java中如何修改方法参数的值

答案是

package myapp;

 

 import org.omg.CORBA.IntHolder;

 public class Test2 {

 public static void change(IntHolder x) {
  x.value = 3*x.value;
 }
 public static void main(String[] args) {

 IntHolder i = new IntHolder(55);
  change(i);
 System.out.println(i.value);

}
}