1 . 右击报错项目->build path->add library->jre system library->system library
2.选择ececution environment->选择对应的jdk(sun SE(sun jdk1.6))
1 . 右击报错项目->build path->add library->jre system library->system library
2.选择ececution environment->选择对应的jdk(sun SE(sun jdk1.6))