Java Generics - Multiple Type Parameters


A Generic class can have muliple type parameters. Following example will showcase above mentioned concept.


Create the following java program using any editor of your choice.

package com.tutorialspoint;

public class GenericsTester {
   public static void main(String[] args) {
      Box<Integer, String> box = new Box<Integer, String>();
      box.add(Integer.valueOf(10),"Hello World");
      System.out.printf("Integer Value :%d\n", box.getFirst());
      System.out.printf("String Value :%s\n", box.getSecond());

      Box<String, String> box1 = new Box<String, String>();
      box1.add("Message","Hello World");
      System.out.printf("String Value :%s\n", box1.getFirst());
      System.out.printf("String Value :%s\n", box1.getSecond());

class Box<T, S> {
   private T t;
   private S s;

   public void add(T t, S s) {
      this.t = t;
      this.s = s;

   public T getFirst() {
      return t;

   public S getSecond() {
      return s;

This will produce the following result.


Integer Value :10
String Value :Hello World
String Value :Message
String Value :Hello World