Java program to print the object of a class

Java Examples Comprehensive

In this tutorial, we will learn how to print the object of a class in Java.

To understand this example, you should understand the followingJava programmingSubject:

• Java classes and objects

Example1:Java program to print objects

class Test {
}
class Main {
　　public static void main(String[] args) {
　　　　//　Create an object of the Test class
　　　　Test obj = new Test();
　　　　//Print Object
　　　　System.out.println(obj);
　　}
}

Output Result

Test@512ddf17

No exemplo acima, criamos um objeto da classe Test. Quando imprimimos o objeto, podemos ver que a saída parece diferente.

Isso é porque, ao imprimir um objeto, é chamado o método toString() da classe do objeto. Ele formata o objeto no formato padrão. Veja o exemplo a seguir:

• Test - Class Name
  

• @ - Concatenate Strings

• 512ddf17 - Object Hash Code

If you want to format the output in your own way, you need to override the toString() method in the class. For example,

class Test {
　　@Override
　　public String toString() {
　　　　return "object";
　　}
}
class Main {
　　public static void main(String[] args) {
　　　　//Create an object of the Test class
　　　　Test obj = new Test();
　　　　//　Print Object
　　　　System.out.println(obj);
　　}
}

Output Result

object

In the above example, the output has changed. This is because here we have overridden the method toString() that returns a string from the object.

To understand the method toString() of the object class, please visitJava Object toString().

Java Examples Comprehensive