版权声明: https://blog.csdn.net/li_xunhuan/article/details/88990724
本文代码部分来自于:https://www.cnblogs.com/heshuchao/p/5376298.html 由于我本人增加了颇多的个人理解,所以转为原创,若有错误,请指正
代码段1.1:
public class Student
{
private String name = null;
public Student(String name)
{
// TODO Auto-generated constructor stub
this.name = name;
}
public void setName(String name)
{
this.name = name;
}
private int calcADD(int a, int b)
{
return a + b;
}
public void fillBlank(int a, int b)
{
int result = calcADD(a, b);
System.out.println(name + "心算:" + a + " + " + b + " = " + result);
}
}
代码段1.2:
public class Test
{
public static void main(String[] args)
{
int a = 1;
int b = 1;
Student s = new Student("小明");
s.fillBlank(a, b);
}
}
代码段2.1:
public class Calculator
{
public int add(int a, int b)
{
return a + b;
}
}
代码段2.2:
public class Student
{
private String name = null;
public Student(String name)
{
// TODO Auto-generated constructor stub
this.name = name;
}
public void setName(String name)
{
this.name = name;
}
@SuppressWarnings("unused")
private int calcADD(int a, int b)
{
return a + b;
}
private int useCalculator(int a, int b)
{
return new Calculator().add(a, b);
}
public void fillBlank(int a, int b)
{
int result = useCalculator(a, b);
System.out.println(name + "使用计算器:" + a + " + " + b + " = " + result);
}
}
代码段2.3:
public class Test
{
public static void main(String[] args)
{
int a = 168;
int b = 291;
Student s = new Student("小明");
s.fillBlank(a, b);
}
}
代码段3.1:
public class SuperCalculator
{
public void add(int a, int b, Student xiaoming)
{
int result = a + b;
xiaoming.fillBlank(a, b, result);
}
}
代码段3.2:
public class Student
{
private String name = null;
public Student(String name)
{
// TODO Auto-generated constructor stub
this.name = name;
}
public void setName(String name)
{
this.name = name;
}
public void callHelp (int a, int b)
{
new SuperCalculator().add(a, b, this);
}
public void fillBlank(int a, int b, int result)
{
System.out.println(name + "求助小红计算:" + a + " + " + b + " = " + result);
}
}
代码段3.3:
public class Test
{
public static void main(String[] args)
{
int a = 26549;
int b = 16487;
Student s = new Student("小明");
s.callHelp(a, b);
}
}
1、2、3代码执行过程分析: 代码段1:
代码段2:
代码段3:
总结:
重点分析代码段3的回调Callback功能的实现:
我们从简单的加法求和中看到面向过程和面向对象的区别: