//object常用方法
 public class test21 {
     public  static void main(String[] args) {
         Object obj = new Object();
         ObjectCl usr = new ObjectCl();
         usr.setAge(6);
         usr.setName("歌谣");
         usr.say();
         //tostring
         String str =usr.toString();
         System.out.println(str);
         //equals
         ObjectCl usr2=new ObjectCl();
         boolean bool=usr2.equals(usr);
         System.out.println(bool);
         //getclass
         System.out.println(usr.getClass());
         //hashcode
         System.out.println(usr.hashCode());
     }
 }
 public class ObjectCl {
     private String name;
     private int age;
     public void say(){
         System.out.println(name);
         System.out.println(age);
     }
     public void setAge(int age) {
         this.age = age;
     }
  
     public int getAge() {
         return age;
     }
  
     public void setName(String name) {
         this.name = name;
     }
  
     public String getName() {
         return name;
     }
  
     @Override
     public String toString() {
         return this.getClass().getName();
     }
     public boolean equals(Object obj){
         return this==obj?false:true;
     }
 }


运行结果

java84-object常用方法tostring，equals，hashcode_System