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Redirect Standard System Output and Error Message to PrintStream in Java

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In a Java program, how can you divert standard system output or error messages, say to a file? ->We can achieve this by using public st...

concatenate arrays of any type - java

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Combining two arrays of any type public static T[] concat(T[] first, T[] second) { T[] result = Arrays.copyOf(first, first.length + se...

difference between an interface and an abstract class

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What's the difference between an interface and an abstract class? Also discuss the similarities.  (Very Important) Abstract class is a ...

Adding image to JPanel Java

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Adding Image to JPanel BufferedImage myPicture = ImageIO.read(new File("path-to-file")); JLabel picLabel = new JLabel(new ImageI...

Read time from internet time server - working java code

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Read time from internet time server - working java code import java.io.*; import java.net.*; import java.util.*; /** * This program makes...

iterate through map hashmap linkedhashmap in java

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How to iterate through Map.. MashMap, LinkedHashMap ...  in Java Method 1 : If you're only interested in the keys, you can iterate thr...

java escape text in regular expression

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Java's a built-in way to escape arbitrary text so that it can be included in a regular expression- For example, users enter "$5...

use of @override annotation in java - why ?

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The @override annotation  is most useful as a compile-time reminder that the intention of the method is to override a parent method. See thi...

java reflection - what is - 101 tutorial

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The name reflection is used to describe code which is able to inspect other code in the same system (or itself). A simple code example o...

Bubble sort working source code - C/C++

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Bubble sort working source code - C/C++ #include <stdio.h> #include <iostream.h> void bubbleSort(int *array,int length)//Bubbl...