PMD在Sun Security规则集中有一个名为ArrayIsStoredDirectly的规则：
Constructors and methods receiving arrays should clone objects and store the copy. This prevents that future changes from the user affect the internal functionality.
这是他们的例子：
public class Foo {
private String [] x;
public void foo (String [] param) {
// Don't do this,make a copy of the array at least
this.x=param;
}
}
我不认为我完全理解这个规则背后的原因.是因为传递的数组中的值可以在其他地方更改吗？传递Collection与传递数组有什么区别？
