Java Data Type Check: Complete Guide

In Java, you can use the getClass() method or the instanceof keyword to check the type of data.

1. Get the class.

Object obj = new String("Hello");
Class objClass = obj.getClass();
System.out.println("数据类型为：" + objClass.getName());

1. identical to

Object obj = new String("Hello");
if (obj instanceof String) {
    System.out.println("数据类型为String");
} else {
    System.out.println("数据类型不是String");
}

Both of these methods can help us to view the type of data.