java_内部类的使用方法：

/**
 * Created by xabcd on 2019/2/16.
 */
public class java_outer
{
    int score = 95;
    void inst()
    {
        Inner in = new Inner();
        in.display();
    }
    class Inner
    {
        void display()
        {
            System.out.println("成绩：score="+score);
        }
    }
}

/**
 * Created by xabcd on 2019/2/16.
 */
public class test_outer
{
    public static void main(String[] args)
    {
        java_outer ou = new java_outer();
                ou.inst();
    }
}



成绩：score=95