for (boolean more = true; more; ) {
           ．．．．
            if (．．．．) {
                ．．．．
                more      = false;
            }
．．．．．
}

ArrayList al=new ArrayList();
Iterator it=al.iterator();
while(it.hasNext()){
      //.......it.next();
}

for(Iterator it=al.iterator();it.hasNext() ; ){
      //.......it.next();   
}
//局部变量要尽量使自己变成黑箱black box,从这点上来看我们总认为for要比while好一点。

qingbo777 wrote:
我比较喜欢用FOR,几乎从来不用while.

public void run(){
 while(true){
    // your thread contents
 }
}

while(myStream.available()>certainValue){
  myStream.read(yourBuffer);
}

for(Iterator i=c.iterator();i.hasNext() ; ){
    //do sth.
}

Iterator i = c.iterator();
while(i.hasNext()){
    //do sth.
}

if(i!=null){ //this i is not that i , but the compiler can not detect it!!
  //do sth.
}

while (true) {
    if (．．．．) {
        ．．．．   
        break;  
    }
    ．．．．．
}