Java.lang.ClassLoader.getResourceAsStream() Method

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Description

The java.lang.ClassLoader.getResourceAsStream() method returns an input stream for reading the specified resource.

Declaration

Following is the declaration for java.lang.ClassLoader.getResourceAsStream() method

public InputStream getResourceAsStream(String name)

Parameters

name − This is the resource name.

Return Value

This method returns an input stream for reading the resource, or null if the resource could not be found.

Exception

NA

Example

The following example shows the usage of java.lang.ClassLoader.getResourceAsStream() method.

package com.tutorialspoint;

import java.lang.*;
import java.io.*;

class ClassLoaderDemo {

   static String getResource(String rsc) {
      String val = "";

      try {
         Class cls = Class.forName("ClassLoaderDemo");

         // returns the ClassLoader object associated with this Class
         ClassLoader cLoader = cls.getClassLoader();
         
         // input stream
         InputStream i = cLoader.getResourceAsStream(rsc);
         BufferedReader r = new BufferedReader(new InputStreamReader(i));

         // reads each line
         String l;
         while((l = r.readLine()) != null) {
            val = val + l;
         } 
         i.close();
      } catch(Exception e) {
         System.out.println(e);
      }
      return val;
   }
    
   public static void main(String[] args) {

     System.out.println("File1: " + getResource("file.txt"));
     System.out.println("File2: " + getResource("test.txt"));                
   }
}  

Assuming we have a text file file.txt, which has the following content −

This is TutorialsPoint!

Assuming we have another text file test.txt, which has the following content −

This is Java Tutorial

Let us compile and run the above program, this will produce the following result −

File1: This is TutorialsPoint!
File2: This is Java Tutorial