Send an Integer through the Socket From a Java application to a C Application

Send an Integer through the Socket From a Java application to a C Application

When you want to send an integer through the socket from a Java application to a C application, or your Java application needs to save some integer in the file so the C application will read it, you need to convert one integer (int type ) to 4 bytes ( array of 4 bytes ). Here is a class that does the job:

 /** Performs conversions between integer ( long ) and 4 bytes and viceversa. */public class IntByteConverter{	private int intValue;	private byte[] byteArray;	public final static int mask = 256;/** IntByteConverter constructor . */public IntByteConverter() {	super();	byteArray = new byte[4];}/** IntByteConverter constructor. */public IntByteConverter(int theIntValue) {	super();	intValue = theIntValue;	byteArray = new byte[4];}/** Converts 4 bytes array to the int. */public void bytesToInt() {	int temp;	int  pMask = 1;	intValue = 0;	for( int i = 0; i < 4; i++ )	{		if( byteArray[i] < 0 )			temp = mask+byteArray[i];		else			temp = byteArray[i];				intValue += temp*pMask;		pMask *= mask;	}		}/** @return byte[] */public byte[] getBytes() {	return byteArray;}/** @return int */public int getIntValue() {	return intValue;}/** Converts the int to 4 bytes array. */public void intToBytes() {	int x = intValue;	byte y = 0;	int temp = 0;	for( int i = 0; i < 4; i++ )	{		y = (byte)(x%mask);		if( y < 0 )		{			byteArray[i] = (byte)(mask + y);			temp = x-(mask+y);		}		else		{			byteArray[i] = y;			temp = x-y;		}		x = temp/mask;	}}/** * Starts the application. * @param args an array of command-line arguments */public static void main(java.lang.String[] args) {	IntByteConverter c = new IntByteConverter( 50 );	c.intToBytes();	c.printBytes();}public void printBytes() {	for( int i = 0; i < 4; i++ )		System.out.print( byteArray[i] + " " );	System.out.println();}public void setBytes(byte[] newByteArray){	byteArray = newByteArray;}public void setInt(int newIntValue){	intValue = newIntValue;	}}

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