skwujinhua wrote:
java中基本類型實現引用传递怎么弄?
java中有沒? java中只有傳對象的時候才是引用传递嗎?

public class ReferenceTest
{   
    public void trickyMethod(Integer number)
    {
        // The number is passed in as a copy of the original reference (i.e. pass by value)
        // If it is pass-by-reference, the number will be changed because of the single reference. 
        number = new Integer(20);
        System.out.println("In the method(), integer=" + number);
    }

    public static void main(String[] args)
    {
        ReferenceTest refTest = new ReferenceTest();
        
        Integer integer = new Integer(10);
        System.out.println("Before trickymethod() integer=" + integer );
        refTest.trickyMethod(integer);
        System.out.println("After trickymethod() integer=" + integer);
    }
}

// the following is the output:
Before trickymethod() integer=10
In the method(), integer=20
After trickymethod() integer=10