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Java Reflection - Class.getResourceAsStream() Examples

Java Reflection Java Java API 

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Class:

java.lang.Class

java.lang.Objectjava.lang.Objectjava.lang.Classjava.lang.Classjava.io.SerializableSerializablejava.lang.reflect.GenericDeclarationGenericDeclarationjava.lang.reflect.TypeTypejava.lang.reflect.AnnotatedElementAnnotatedElementLogicBig

Method:

public InputStream getResourceAsStream(String name)
Parameters:
name - name of the desired resource
Returns:
A InputStream object or null if no resource with this name is found

See Also: Different ways to load classpath resources in Java

Examples


package com.logicbig.example.clazz;

import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;

public class GetResourceAsStreamExample {

    public static void main(String... args) throws IOException {
        Class<GetResourceAsStreamExample> c = GetResourceAsStreamExample.class;
        //getting this class
        String resource = "/com/logicbig/example/clazz/GetResourceAsStreamExample.class";
        InputStream rs = c.getResourceAsStream(resource);
        String s = convertStreamToString(rs);
        System.out.println(s);
    }

    private static String convertStreamToString(InputStream is) {
        Scanner s = new Scanner(is).useDelimiter("\\A");
        return s.hasNext() ? s.next() : "";
    }
}

Output

Êþº¾   4 R
  . / 0
 1 2
  3	 4 5
 6 7 8
  9 :
  ;
  <
  = > ? <init> ()V Code LineNumberTable LocalVariableTable this 7Lcom/logicbig/example/clazz/GetResourceAsStreamExample; main ([Ljava/lang/String;)V args [Ljava/lang/String; c Ljava/lang/Class; resource Ljava/lang/String; rs Ljava/io/InputStream; s LocalVariableTypeTable JLjava/lang/Class<Lcom/logicbig/example/clazz/GetResourceAsStreamExample;>; 
Exceptions @ convertStreamToString )(Ljava/io/InputStream;)Ljava/lang/String; is Ljava/util/Scanner; 
StackMapTable A 
SourceFile GetResourceAsStreamExample.java   5com/logicbig/example/clazz/GetResourceAsStreamExample </com/logicbig/example/clazz/GetResourceAsStreamExample.class B C D & ' E F G H I J java/util/Scanner  K \A L M N O P Q   java/lang/Object java/io/IOException java/lang/String java/lang/Class getResourceAsStream )(Ljava/lang/String;)Ljava/io/InputStream; java/lang/System out Ljava/io/PrintStream; java/io/PrintStream println (Ljava/lang/String;)V (Ljava/io/InputStream;)V useDelimiter '(Ljava/lang/String;)Ljava/util/Scanner; hasNext ()Z next ()Ljava/lang/String; !               /     *· ±                        ‰       “     LM+,¶ N-¸ :² ¶ ±                         4                          	 !   "        #  $     % 
 & '     i     » Y*· 	
¶ L+¶ ™ 
+¶ 
§ °       
               (       ! )  *    ü  A +  ,    -

See Also