总结一下Java回调机制的相关知识

public interface ICallBack {
    public void calResult(int a,int b,int result);
}
 
public class CalImpl implements ICallBack{
 
    private int a;
    private int b;
 
    public CalImpl(int a, int b){
        this.a = a;
        this.b = b;
    }
 
    public void calculate(){
       new CalLogic().calculateLogic(a,b,this);
    }
 
    @Override
    public void calResult(int a, int b, int result) {
        //控制台输出
        System.out.println(a + " + " + b + " = " + result);
    }
}
 
public class CalLogic {
 
    public void calculateLogic(int a,int b,ICallBack iCallBack){
        int result = a + b;
        System.out.println("被调用线程执行完成...");
        iCallBack.calResult(a, b, result);
    }
 
}
 
public class TestCallBack {
 
    public static void main(String[] args) {
        int a = 22;
        int b = 33;
        //实例化计算器Calculator类
        CalImpl calculator = new CalImpl(a,b);
        //调用计算器calculator的计算函数
        calculator.calculate();
        System.out.println("主线程执行完成...");
 
        //22 + 33 = 55
        //主线程执行完成...
    }
}