Java中4种类型的内部类 .

在Java中有4种不同类型的内部类可以使用。下面给出它们的名称和例子。

1.静态嵌套类(Static Nested Classes)

class Outer {
static class Inner {
void go() {
System.out.println("Inner class reference is: " + this);
}
}
}
public class Test {
public static void main(String[] args) {
Outer.Inner n = new Outer.Inner();
n.go();
}
}

class Outer {

	static class Inner {

		void go() {

			System.out.println("Inner class reference is: " + this);

		}

	}

}

public class Test {

	public static void main(String[] args) {

		Outer.Inner n = new Outer.Inner();

		n.go();

	}

}

输出：Inner class reference is: Outer$Inner@19e7ce87

2.成员内部类(Member Inner Class)

成员类是特定于实例的。它可以访问所有方法，字段和外部类本身的引用。

public class Outer {
private int x = 100;
public void makeInner(){
Inner in = new Inner();
in.seeOuter();
}
class Inner{
public void seeOuter(){
System.out.println("Outer x is " + x);
System.out.println("Inner class reference is " + this);
System.out.println("Outer class reference is " + Outer.this);
}
}
public static void main(String [] args){
Outer o = new Outer();
Inner i = o.new Inner();
i.seeOuter();
}
}

public class Outer {

    private int x = 100;

    public void makeInner(){

        Inner in = new Inner();

        in.seeOuter();

    }

    class Inner{

        public void seeOuter(){

            System.out.println("Outer x is " + x);

            System.out.println("Inner class reference is " + this);

            System.out.println("Outer class reference is " + Outer.this);

        }

    }

    public static void main(String [] args){

    	Outer o = new Outer();

        Inner i = o.new Inner();

        i.seeOuter();

    }

}

输出：

Outer x is 100
Inner class reference is Outer$Inner@4dfd9726
Outer class reference is Outer@43ce67ca

3.局部方法内部类(Method-Local Inner Classes)

public class Outer {
private String x = "outer";
public void doStuff() {
class MyInner {
public void seeOuter() {
System.out.println("x is " + x);
}
}
MyInner i = new MyInner();
i.seeOuter();
}
public static void main(String[] args) {
Outer o = new Outer();
o.doStuff();
}
}

public class Outer {

	private String x = "outer";

	public void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer o = new Outer();

		o.doStuff();

	}

}

输出：x is outer

public class Outer {
private static String x = "static outer";
public static void doStuff() {
class MyInner {
public void seeOuter() {
System.out.println("x is " + x);
}
}
MyInner i = new MyInner();
i.seeOuter();
}
public static void main(String[] args) {
Outer.doStuff();
}
}

public class Outer {

	private static String x = "static outer";

	public static void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer.doStuff();

	}

}

输出：x is static outer

4.匿名内部类(Anonymous Inner Classes)

当您需要给一个GUI应用程序窗口小部件加一个动作监听器时，匿名内部类就会经常被用到。

button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
comp.setText("Button has been clicked");
}
});
在Java中有4种不同类型的内部类可以使用。下面给出它们的名称和例子。

1.静态嵌套类(Static Nested Classes)
1. class Outer {
2. static class Inner {
3. void go() {
4. System.out.println("Inner class reference is: " + this);
5. }
6. }
7. }
8. public class Test {
9. public static void main(String[] args) {
10. Outer.Inner n = new Outer.Inner();
11. n.go();
12. }
13. }
```
class Outer {

	static class Inner {

		void go() {

			System.out.println("Inner class reference is: " + this);

		}

	}

}

public class Test {

	public static void main(String[] args) {

		Outer.Inner n = new Outer.Inner();

		n.go();

	}

}
```
输出：Inner class reference is: Outer$Inner@19e7ce87

2.成员内部类(Member Inner Class)

成员类是特定于实例的。它可以访问所有方法，字段和外部类本身的引用。
1. public class Outer {
2. private int x = 100;
3. public void makeInner(){
4. Inner in = new Inner();
5. in.seeOuter();
6. }
7. class Inner{
8. public void seeOuter(){
9. System.out.println("Outer x is " + x);
10. System.out.println("Inner class reference is " + this);
11. System.out.println("Outer class reference is " + Outer.this);
12. }
13. }
14. public static void main(String [] args){
15. Outer o = new Outer();
16. Inner i = o.new Inner();
17. i.seeOuter();
18. }
19. }
```
public class Outer {

    private int x = 100;

    public void makeInner(){

        Inner in = new Inner();

        in.seeOuter();

    }

    class Inner{

        public void seeOuter(){

            System.out.println("Outer x is " + x);

            System.out.println("Inner class reference is " + this);

            System.out.println("Outer class reference is " + Outer.this);

        }

    }

    public static void main(String [] args){

    	Outer o = new Outer();

        Inner i = o.new Inner();

        i.seeOuter();

    }

}
```
输出：

Outer x is 100
Inner class reference is Outer$Inner@4dfd9726
Outer class reference is Outer@43ce67ca

3.局部方法内部类(Method-Local Inner Classes)
1. public class Outer {
2. private String x = "outer";
3. public void doStuff() {
4. class MyInner {
5. public void seeOuter() {
6. System.out.println("x is " + x);
7. }
8. }
9. MyInner i = new MyInner();
10. i.seeOuter();
11. }
12. public static void main(String[] args) {
13. Outer o = new Outer();
14. o.doStuff();
15. }
16. }
```
public class Outer {

	private String x = "outer";

	public void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer o = new Outer();

		o.doStuff();

	}

}
```
输出：x is outer
1. public class Outer {
2. private static String x = "static outer";
3. public static void doStuff() {
4. class MyInner {
5. public void seeOuter() {
6. System.out.println("x is " + x);
7. }
8. }
9. MyInner i = new MyInner();
10. i.seeOuter();
11. }
12. public static void main(String[] args) {
13. Outer.doStuff();
14. }
15. }
```
public class Outer {

	private static String x = "static outer";

	public static void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer.doStuff();

	}

}
```
输出：x is static outer

4.匿名内部类(Anonymous Inner Classes)

当您需要给一个GUI应用程序窗口小部件加一个动作监听器时，匿名内部类就会经常被用到。
1. button.addActionListener(new ActionListener(){
2. public void actionPerformed(ActionEvent e){
3. comp.setText("Button has been clicked");
4. }
5. });
  在Java中有4种不同类型的内部类可以使用。下面给出它们的名称和例子。
  
  1.静态嵌套类(Static Nested Classes)
  1. class Outer {
  2. static class Inner {
  3. void go() {
  4. System.out.println("Inner class reference is: " + this);
  5. }
  6. }
  7. }
  8. public class Test {
  9. public static void main(String[] args) {
  10. Outer.Inner n = new Outer.Inner();
  11. n.go();
  12. }
  13. }
```
class Outer {

	static class Inner {

		void go() {

			System.out.println("Inner class reference is: " + this);

		}

	}

}

public class Test {

	public static void main(String[] args) {

		Outer.Inner n = new Outer.Inner();

		n.go();

	}

}
```
  输出：Inner class reference is: Outer$Inner@19e7ce87
  
  2.成员内部类(Member Inner Class)
  
  成员类是特定于实例的。它可以访问所有方法，字段和外部类本身的引用。
  1. public class Outer {
  2. private int x = 100;
  3. public void makeInner(){
  4. Inner in = new Inner();
  5. in.seeOuter();
  6. }
  7. class Inner{
  8. public void seeOuter(){
  9. System.out.println("Outer x is " + x);
  10. System.out.println("Inner class reference is " + this);
  11. System.out.println("Outer class reference is " + Outer.this);
  12. }
  13. }
  14. public static void main(String [] args){
  15. Outer o = new Outer();
  16. Inner i = o.new Inner();
  17. i.seeOuter();
  18. }
  19. }
```
public class Outer {

    private int x = 100;

    public void makeInner(){

        Inner in = new Inner();

        in.seeOuter();

    }

    class Inner{

        public void seeOuter(){

            System.out.println("Outer x is " + x);

            System.out.println("Inner class reference is " + this);

            System.out.println("Outer class reference is " + Outer.this);

        }

    }

    public static void main(String [] args){

    	Outer o = new Outer();

        Inner i = o.new Inner();

        i.seeOuter();

    }

}
```
  输出：
  
  Outer x is 100
  Inner class reference is Outer$Inner@4dfd9726
  Outer class reference is Outer@43ce67ca
  
  3.局部方法内部类(Method-Local Inner Classes)
  1. public class Outer {
  2. private String x = "outer";
  3. public void doStuff() {
  4. class MyInner {
  5. public void seeOuter() {
  6. System.out.println("x is " + x);
  7. }
  8. }
  9. MyInner i = new MyInner();
  10. i.seeOuter();
  11. }
  12. public static void main(String[] args) {
  13. Outer o = new Outer();
  14. o.doStuff();
  15. }
  16. }
```
public class Outer {

	private String x = "outer";

	public void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer o = new Outer();

		o.doStuff();

	}

}
```
  输出：x is outer
  1. public class Outer {
  2. private static String x = "static outer";
  3. public static void doStuff() {
  4. class MyInner {
  5. public void seeOuter() {
  6. System.out.println("x is " + x);
  7. }
  8. }
  9. MyInner i = new MyInner();
  10. i.seeOuter();
  11. }
  12. public static void main(String[] args) {
  13. Outer.doStuff();
  14. }
  15. }
```
public class Outer {

	private static String x = "static outer";

	public static void doStuff() {

		class MyInner {

			public void seeOuter() {

				System.out.println("x is " + x);

			}

		}

		MyInner i = new MyInner();

		i.seeOuter();

	}

	public static void main(String[] args) {

		Outer.doStuff();

	}

}
```
  输出：x is static outer
  
  4.匿名内部类(Anonymous Inner Classes)
  
  当您需要给一个GUI应用程序窗口小部件加一个动作监听器时，匿名内部类就会经常被用到。
  1. button.addActionListener(new ActionListener(){
  2. public void actionPerformed(ActionEvent e){
  3. comp.setText("Button has been clicked");
  4. }
  5. });

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Java中4种类型的内部类 .

1.静态嵌套类(Static Nested Classes)

2.成员内部类(Member Inner Class)

3.局部方法内部类(Method-Local Inner Classes)

4.匿名内部类(Anonymous Inner Classes)

1.静态嵌套类(Static Nested Classes)

2.成员内部类(Member Inner Class)

3.局部方法内部类(Method-Local Inner Classes)

4.匿名内部类(Anonymous Inner Classes)

1.静态嵌套类(Static Nested Classes)

2.成员内部类(Member Inner Class)

3.局部方法内部类(Method-Local Inner Classes)

4.匿名内部类(Anonymous Inner Classes)

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