覆写前：
/**
* Created by xabcd on 2019/2/16.
*/
class total_print extends Object{
String name = "张三:" ;
int age = 25;
}
/**
* Created by xabcd on 2019/2/16.
*/
public class test_print
{
public static void main(String args[])
{
total_print p = new total_print();
System.out.println(p);
}
}
结果：
total_print@4554617c
覆写后：
/**
* Created by xabcd on 2019/2/16.
*/
class total_print extends Object{
String name = "张三:" ;
int age = 25;
public String toString()
{
return"我是："+this.name+",今年："+this.age+"岁";
}
}
/**
* Created by xabcd on 2019/2/16.
*/
public class test_print
{
public static void main(String args[])
{
total_print p = new total_print();
//此时本行相当于 System.out.println(p.toString());
System.out.println(p);
}
}
结果： 我是：张三:,今年：25岁
