异常：java.util.ConcurrentModificationException

Quote:

异常：java.util.ConcurrentModificationException

在Map或者Collection的时候，不要用它们的API直接修改集合的内容，如果要修改可以用Iterator的remove()方法，例如：

public void setReparation( Reparation reparation ) {
for (Iterator it = this.reparations.iterator();it.hasNext();){ //reparations为Collection
Reparation repa = (Reparation)it.next();
if (repa.getId() == reparation.getId()){
this.reparations.remove(repa);
this.reparations.add(reparation);
}
}
}

如上写会在运行期报ConcurrentModificationException，可以如下修改：

public void setReparation( Reparation reparation ) {
boolean flag = false;
for (Iterator it = this.reparations.iterator();it.hasNext();){ //reparations为Collection
Reparation repa = (Reparation)it.next();
if (repa.getId() == reparation.getId()){
it.remove();
flag = true;
break;
}
}
if(flag){
this.reparations.add(reparation);
}
}

具体可以参考：http://gceclub.sun.com.cn/yuanchuang/week-14/iterator.html

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