初识回调函数

package com.cgm.callback;

public class CallBackTest {
public static void main(String[] args) {
Runner run=new Runner();
run.query("sql", new RunHandler() { //匿名内部类实现接口
public void handler() {
System.out.println("bbbbbbbbbbbbbb");
}
});
System.out.println("-------------------");
}

}

class Runner{
public void query(String sql,RunHandler rh  ){
rh.handler();
}
}

interface RunHandler{
public void handler();
}