Brief discussion on javaSE object-oriented (Object class toString)

Each object has an address hash value in memory, which is in hexadecimal.

Call the hashCode() method of the Object object to return the hash value of this object

Call Integer.toHexString() method to convert hexadecimal

Call the toString() method of the Object object to get: class name @ hash value

Usually we will rewrite the toString() method because the default is not very meaningful

The implementation principle is the reflection of the class

When we create an object, the xxx.class file will be generated on the hard disk. jdk defines the Class class to describe these class files

Call the getClass() method of the Object object to get the Class object

Call the getName() method of the Class object to get the class name

 public class ObjectDemo { /** * @param args */ public static void main(String[] args) { ObjectDemo od=new ObjectDemo(); System.out.println(od.toString());//Output ObjectDemo@26f04d94 System.out.println(Integer.toHexString(od.hashCode()));//Output 26f04d94 //Reflect Class c=od.getClass(); System.out.println(c.getName()+"@"+Integer.toHexString(od.hashCode())); }}

The above brief discussion of javaSE object-oriented (Object class toString) is all the content I share with you. I hope it can give you a reference and I hope you can support Wulin.com more.