import java.util.LinkedList;
public class TestC { /**
* @param args
*/
private LinkedList<Class<? >> carList;
TestC(){
carList.add(Me.class); //这一行有错
}
public static void main(String[] args) {
// TODO Auto-generated method stub
new TestC();
}
}class Me{
private int i;
Me(int i){this.i=i;}
}Exception in thread "main" java.lang.NullPointerException
at TestC.<init>(TestC.java:11)
at TestC.main(TestC.java:15)
没有new ,carList=null,当然空指针了