代码如下所示,TestEX是非静态类,而它的主方法是静态的,TestEX类中含有两个内部类,两个内部类也是非静态的,内部类中的方法同样也是非静态的。
问题是:在静态的主方法中,实例化了内部类,为什么就可以调用非静态了呢?
哪个圈绕不出来了,求帮助!
public class TestEX{
public class IntegerException extends Exception {
String message;
public IntegerException(int m) {
message = "age " + m +" is wrong!";
}
public String toString() {
return message;
}
}
public class People {
private int age;
void setAge(int age) throws IntegerException {
if (age >= 160 || age <= 0) {
throw new IntegerException(age);
}
else {
this.age = age;
}
}
int getAge() {
System.out.println("age " + age + " is right!");
return age;
}
}
public static void main(String[] args) {
TestEX.People wang = new TestEX().new People();
TestEX.People zhang = new TestEX().new People();
try{
wang.setAge(180);
System.out.println(wang.getAge());
}catch(IntegerException e){
System.out.println(e.toString());
}
try{
zhang.setAge(37);
System.out.println(zhang.getAge());
}catch (IntegerException e) {
System.out.println(e.toString());
}
}
}