How to import all classes in Java?

All the classes in a package can be imported using the import statement along with the character *. For example - All the classes in the package java.util can be imported using import java.util.*;

A program that demonstrates this in Java is given as follows:

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      Stack stack = new Stack();
      stack.push("Apple");
      stack.push("Mango");
      stack.push("Guava");
      stack.push("Pear");
      stack.push("Orange");
      System.out.println("The stack elements are: " + stack);
   }
}

Output

The stack elements are: [Apple, Mango, Guava, Pear, Orange]

Now let us understand the above program.

The import statement along with the character * is used to import all the classes of the java.util package. The Stack is created using the class Stack. Then Stack.push() method is used to add the elements to the stack. Finally the stack is displayed. A code snippet which demonstrates this is as follows:

Stack stack = new Stack();
stack.push("Apple");
stack.push("Mango");
stack.push("Guava");
stack.push("Pear");
stack.push("Orange");
System.out.println("The stack elements are: " + stack);