初探Java内部类的使用

OuterTest.this.test

private void createMemberInner(){
    MemberInner memberInner = new MemberInner();
    memberInner.memberInnerTest();
}

OuterTest outerTest = new OuterTest();
MemberInner memberInner = outerTest.new MemberInner();

MemberInner memberInner = new OuterTest().new MemberInner();

  OuterVar outerVar = new OuterVar();
  InnerOne innerOne = outerVar.new InnerOne();
  InnerTwo innerTwo = outerVar.new InnerTwo();
public class OuterVar {
private int var = 0;
 
class InnerOne{
  private void innerOnePrint(){
      System.out.println("innerOnePrint:"+var);
      var+=1;
  }
}
 
class InnerTwo{
  private void innerTwoPrint(){
      System.out.println("innerTwoPrint:"+var);
  }
}
 
public static void main(String[] args) {
  InnerOne innerOne = new OuterVar().new InnerOne();
  InnerTwo innerTwo = new OuterVar().new InnerTwo();
 
  innerOne.innerOnePrint();
  innerTwo.innerTwoPrint();
}
}

public class OuterTest {
    
    private String test = "OuterTest";
 
    private void createMemberInner(){
        MemberInner memberInner = new MemberInner();
        memberInner.memberInnerTest();
    }
 
    class MemberInner{
        private String test = "MemberInnerTest";
 
        public void memberInnerTest(){
            System.out.println("MemberInner");
            System.out.println(test);
            System.out.println(OuterTest.this.test);
 
        }
    }
 
    public static void main(String[] args) {
        // 成员内部类
        OuterTest outerTest = new OuterTest();
        MemberInner memberInner = outerTest.new MemberInner();
//        MemberInner memberInner = new OuterTest().new MemberInner();
        
        memberInner.memberInnerTest();
    }
}
 
 

private void createStaticInner(){
    StaticInner staticInner = new StaticInner();
    staticInner.staticInnerTest();
}

StaticInner staticInner = new StaticInner();
public class OuterTest {
    
    private String test = "OuterTest";
 
    private void createStaticInner(){
        StaticInner staticInner = new StaticInner();
        staticInner.staticInnerTest();
    }
 
 
    static class StaticInner{
        private String test = "StaticInnerTest";
 
        public void staticInnerTest(){
            System.out.println("StaticInner");
            System.out.println(test);
        }
    }
 
    public static void main(String[] args) {
        // 静态内部类
        StaticInner staticInner = new StaticInner();
        staticInner.staticInnerTest();
    }
}
 

//匿名内部类
interface Father{
    public abstract void talk();
 
    public abstract void eat();
}
public class Test {
    public static void main(String[] args) {
        //匿名内部类
        Father father = new Father() {
            @Override
            public void talk() {
                System.out.println("I'm Father");
            }
 
            @Override
            public void eat() {
                System.out.println("I'm eating");
            }
        };
        father.talk();
        father.eat();
    }
}