Java内部类（三）匿名内部类

如果只需要创建一个内部类的一个对象，就没必要给这个类一个名字。这个没有名字的内部类叫做匿名内部类。

1. 扩展自接口的匿名内部类

package innerclass;

public interface Say {
public void saySomething();
}

package innerclass;

public class TestSay {

public static void main(String[] args) {
// TODO Auto-generated method stub
Say say = new Say() {

@Override
public void saySomething() {
// TODO Auto-generated method stub
System.out.println("I LOVE YOU");

}
};
say.saySomething();
}

}

运行结果：

I LOVE YOU

2.扩展自类的匿名内部类

package innerclass;

public class Said {
public void saidSomething() {
System.out.println("I LOVED YOU");
}
}

package innerclass;

public class TestSaid {

public static void main(String[] args) {
// TODO Auto-generated method stub
Said said = new Said(){
public void saidSomething() {
System.out.println("I DON'T LOVE YOU NOW");
}
};
said.saidSomething();

}

}

运行结果：

I DON'T LOVE YOU NOW