内部类的创建

package mypack;

public class Outer {

	Inner1 w = new Inner1();
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Outer demo = new Outer();
		
		//创建内部类,要先把外部类实例化,然后实例化内部类
		Outer.Inner1 Inner1 = demo.new Inner1();
		//创建静态内部类,可以直接实例化
		Outer.Inner2 Inner2 = new Outer.Inner2();
		
	}
	//非静态内部类
	class Inner1{
		Inner1(){
			
		}
		int a = 0;
		
	}
	//静态内部类
	static class Inner2{
		Inner2(){
			
		}
		int a = 0;
		
	}
}