test.java

JAVA培训用实用代码

class A {
	private int s;
	public class B {
		public void mb() {
			s = 200;
			System.out.println(s);
		}
	}
}

public class Test {
	public static void main(String[] args) {
		A a = new A();
		A.B b = a.new B(); // 创建一个依赖于a而存在的b
		b.mb();
	}
}