java中的Object类的toSpring()方法

package com.itheima_56;

public class Student extends Object{

private String name;

private int age;

public Student(){

}

public Student(String name, int age) {

this .name = name;

this .age = age;

}

public String getName() {

return name;

}

public void setName(String name) {

this .name = name;

}

public int getAge() {

return age;

}

public void setAge( int age) {

this .age = age;

}

//重写toString方法

@Override

public String toString() {

return "Student{" +

"name='" + name + '\ '' +

", age=" + age +

'}' ;

}

}

package com.itheima_56;

/*

Object是类层次结构的根，每个类都可以将Object作为超类。所有类都直接或者间接的继承自该类

看方法的源码：选中方法，按下Ctrl+B

建议所有子类重写此方法

如何重写呢？自动生成即可

*/

public class ObjectDemo {

public static void main(String[] args) {

Student s = new Student();

s.setAge( 18 );

s.setName( "王昱翔" );

System.out.println(s); //默认com.itheima_56.Student@5cad8086

System.out.println(s.toString());

/*

public void println(Object x) { //x = s

String s = String.valueOf(x);

synchronized (this) {

print(s);

newLine();

}

}

public static String valueOf(Object obj) { //obj = x;

return (obj == null) ? "null" : obj.toString();

}

public String toString() {

return getClass().getName() + "@" + Integer.toHexString(hashCode());

}

*/

}

}