//外部类
public class Outer {
    private String name = "qiudajiang";
    private int age = 10;
    //外部类方法
    public void showOuter(){
        //局部变量
        String address = "xxx";
        class Inner{
            //局部内部类属性
            private String phone = "123";
            private String email = "qdj168@qq.com";
            public void showInner(){
                //访问外部类属性
                System.out.println(Outer.this.name);
                System.out.println(Outer.this.age); //如果showOuter方法是一个静态方法，则需要实例化一个外部类对象，才能访问外部类属性
                //访问内部类属性
                System.out.println(this.email);
                System.out.println(this.phone);
                //访问局部变量，jdk1.7要求，变量必须是常量 final ,jdk1.8会自动添加final
                System.out.println(address);
            }
        }
        //想要调用showInner方法，需要创建一个局部类对象
        Inner inner = new Inner();
        inner.showInner();
    }
}

public class OuterTest {
    public static void main(String[] args) {
        Outer outer = new Outer();
        outer.showOuter();
    }
}