静态成员类，非静态成员类，匿名类、静态匿名类、局部类区别和使用

 

静态成员类，非静态成员类，匿名类、静态匿名类、局部类，究竟有什么区别？请看下面的示例代码：

 

package interClass;

 

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

 

public class MainClass {

private static String getStaticName(){

return "mainClass static member";

}

private static String getNonStaticName(){

return "mainClass NonStatic member";

}

public static class staticClass{

private static String getInterName(){

return "staticClass";

}

}

public class NonStaticClass{

//静态非成员类不能有静态成员

private  String getInterName(){

return "NonStaticClass";

}

}

public static void main(String[] args){

//静态成员类

System.out.println(MainClass.staticClass.getInterName());

MainClass main = new MainClass();

//非静态成员类

NonStaticClass nonStaticClass=main.new NonStaticClass();//初始化非静态类

System.out.println(nonStaticClass.getInterName());

//匿名类

List<String> list = new ArrayList<String>();

list.add("abc");

list.add("abcd");

list.add("a");

Collections.sort(list, new Comparator<String>() {

 public int compare(String o1, String o2) {  

       return ((String)o1).length() - ((String)o2).length();  

   }  

});

System.out.println(list);

//内部类，只能有final和abstatct修饰符

final class  LocalClass {

private String getName(){

return "localClass";

}

}

LocalClass local=new LocalClass();

System.out.println(local.getName());

}

}