Integer t =null ;
if(t==100){
System.out.println(t);
}
以上会报空指针
Exception in thread "main" java.lang.NullPointerException
at test.test1.main(test1.java:35)
Integer t =null ;
if(t==100){
System.out.println(t);
}
以上会报空指针
Exception in thread "main" java.lang.NullPointerException
at test.test1.main(test1.java:35)