Question

谁能帮我解释一个java小程序，我有一小部分看不懂

class Outer
{
int outer_i = 50;
private void test()
{
Inner in = new Inner(this);
in.display();
}

/*class Inner
{
void display()
{
System.out.println("outer_i = " + outer_i);
}
}*/
public static void main(String [] args)
{
Outer outer = new Outer();
outer.test();
}
}

class Inner
{
Outer outer = new Outer();
public Inner(Outer outer)
{
this.outer = outer;
}
void display()
{
System.out.println("outer_i = " + outer.outer_i);
}
}

第六行和第26到30行，谢谢啊～～～～～

Answer 1

Inner in = new Inner(this); //this指该方法所在的类Outer
this.outer = outer;//这样写就明白了，Inner.outer=outer,前面的outer是代码中刚刚new的，后面的outer是参数传过来的