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nsquare-jdzonensquare-jdzone
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Java Byte Operation
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‎JavaByteOperation/.idea/compiler.xml‎

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‎JavaByteOperation/.idea/encodings.xml‎

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‎JavaByteOperation/.idea/kotlinc.xml‎

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‎JavaByteOperation/.idea/misc.xml‎

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‎JavaByteOperation/.idea/modules.xml‎

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‎JavaByteOperation/.idea/workspace.xml‎

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‎JavaByteOperation/JavaByteOperation.iml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
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<output url="file://$MODULE_DIR$/target/classes" />
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<output-test url="file://$MODULE_DIR$/target/test-classes" />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
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<sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
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<excludeFolder url="file://$MODULE_DIR$/target" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎JavaByteOperation/abc.txt‎

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‎JavaByteOperation/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>JavaByteOperation</groupId>
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<artifactId>JavaByteOperation</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<build>
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<finalName>JavaByteOperation</finalName>
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<plugins>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎JavaByteOperation/src/main/java/com/javadeveloperzone/ByteOperationUtil.java‎

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package com.javadeveloperzone;
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import java.nio.ByteBuffer;
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/**
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* Created by JavaDeveloperZone on 2/5/2018.
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*/
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public class ByteOperationUtil {
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public static void main(String[] args) {
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ByteOperationUtil byteOperationUtil = new ByteOperationUtil();
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int number = 444;
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System.out.println("***************************");
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byte [] intBytes = byteOperationUtil.convertIntToByteArray(number);
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int num = byteOperationUtil.convertByteArrayToInt(intBytes);
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System.out.println("Num is :"+num);
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for(byte b : intBytes){
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System.out.println(b);
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}
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System.out.println("***************************");
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float floatNumber = 444.4f;
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intBytes = byteOperationUtil.convertFloatToByteArray(floatNumber);
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floatNumber = byteOperationUtil.convertByteArrayToFlat(intBytes);
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System.out.println("Num is :"+floatNumber);
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for(byte b : intBytes){
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System.out.println(b);
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}
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System.out.println("***************************");
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double doubleNumber = 888.4d;
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intBytes = byteOperationUtil.convertDoubleToByteArray(doubleNumber);
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doubleNumber = byteOperationUtil.convertByteArrayToDouble(intBytes);
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System.out.println("Num is :"+doubleNumber);
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for(byte b : intBytes){
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System.out.println(b);
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}
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}
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private byte [] convertIntToByteArray(int number) {
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ByteBuffer byteBuffer = ByteBuffer.allocate(4);
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byteBuffer.putInt(number);
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return byteBuffer.array();
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}
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private byte [] convertDoubleToByteArray(double number) {
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ByteBuffer byteBuffer = ByteBuffer.allocate(8);
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byteBuffer.putDouble(number);
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return byteBuffer.array();
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}
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private byte [] convertFloatToByteArray(float number) {
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ByteBuffer byteBuffer = ByteBuffer.allocate(8);
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byteBuffer.putFloat(number);
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return byteBuffer.array();
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}
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private int convertByteArrayToInt(byte[] intBytes){
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ByteBuffer byteBuffer = ByteBuffer.wrap(intBytes);
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return byteBuffer.getInt();
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}
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private byte[] convertIntArrayToByteArray(int[] data) {
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if (data == null) return null;
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// ----------
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byte[] byts = new byte[data.length * 4];
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for (int i = 0; i < data.length; i++)
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System.arraycopy(convertIntToByteArray(data[i]), 0, byts, i * 4, 4);
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return byts;
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}
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public int[] convertByteArrayToIntArray(byte[] data) {
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if (data == null || data.length % 4 != 0) return null;
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// ----------
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int[] ints = new int[data.length / 4];
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for (int i = 0; i < ints.length; i++)
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ints[i] = ( convertByteArrayToInt(new byte[] {
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data[(i*4)],
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data[(i*4)+1],
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data[(i*4)+2],
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data[(i*4)+3],
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} ));
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return ints;
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}
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private double convertByteArrayToDouble(byte[] doubleBytes){
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ByteBuffer byteBuffer = ByteBuffer.wrap(doubleBytes);
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return byteBuffer.getDouble();
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}
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private float convertByteArrayToFlat(byte[] floatBytes){
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ByteBuffer byteBuffer = ByteBuffer.wrap(floatBytes);
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return byteBuffer.getFloat();
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}
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}

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