why wrote:
请使用准确的文字描述作为标题
It will be removed if you don't correct it (by editing the first post).

reference -- frankly I don't know what/where you're referring to.
Ch3 / Assignment -- reference vs value, I don't know anyone would not understand this.
Since the primitive holds the actual value and not a reference to an object, when you assign primitives, you copy the contents from one place to another. ...

Ch6 / Composition syntax -- object reference vs primitive value
Until now, composition has been used quite frequently. You simply place object references inside new classes. For example, suppose you’d like an object that holds several String objects, a couple of primitives, and an object of another class. For the nonprimitive objects, you put references inside your new class, but you define the primitives directly: ...
...
Primitives that are fields in a class are automatically initialized to zero, as noted in Chapter 2. But the object references are initialized to null


void -- this method has no return value

skymysky777 wrote:
有点晕~~！~
VOID明白是什么意思！~~、
关于reference..。。。。有点晕~~！（原因本人的英语不太好~！）请用中文~谢谢~

why wrote:
Sorry, 敝人不太清楚 reference 的標準中譯是甚麼，有点晕～～
請閣下下載有關章節的中譯研習

不过还是请有关人士回答帮助我~~~再下先谢谢了~~！

leiofll wrote:
void 就是返回值无类型的意思
那个reference不太清楚了

public class Reference {
    int i;
    Reference(int i){
        this.i = i;
    }
    public static void main(String[] args){
        Reference r1 = new Reference(1);
        Reference r2 = new Reference(2);
        Reference r3 = r1;
        System.out.println("r1 = " + r1.i);
        System.out.println("r2 = " + r2.i);
        System.out.println("r3 = " + r3.i);
        r3 = r2;
        System.out.println("r3 changed");
        System.out.println("r3 = " + r3.i);
    }
}

ljy0000 wrote:
可以借用C++中的一个名词“引用”，但是与C++中的“引用”具有很大区别，你看看第2章的注解10，作者自己也拿不准。