Get Property by Name

In this Tutorial we want to describe you a code that helps you in understanding to get Property by Name. For this we have a class name "Get Property By Name". Inside the main method we have the list of method that help you to get the Properties of System-

1)System.getProperties ( ) - This Method returns you current system properties by assigning an instance of properties class and store the current system properties in it.

2)stringPropertyNames( ) - This Method returns you the current system properties in a Set object set (Collection interface).

3)Iterator ( ) - This allow you to traverse the list of element in a collection.

We declare a String variable name key inside the main method followed by while loop, that is used to evaluate or check more element present in a iterator .If more element is present, the iterator call next( ).to string returns you the next element in the iterator, convert it into a string and store in a String variable key. The System.out.println is used to print the properties of the system by calling properties.getProperty( key).

GetPropertyByName.java




import java.util.*;



public class GetPropertyByName {



    public static void main(String args[]) {



        Properties properties = System.getProperties();

        Set set = properties.stringPropertyNames();

        Iterator iterator = set.iterator();



        String key;

        while (iterator.hasNext()) {

            key = iterator.next().toString();



            System.out.print(key + " : ");

            System.out.println(properties.getProperty(key));

        }

    }

}

Output

`java.runtime.name`	`:`	`Java(TM) SE Runtime Environment`
`sun.boot.library.path`	`:`	`C:\Program Files\Java\jdk1.6.0_01\jre\bin`
`java.vm.version`	`:`	`1.6.0_01-b06`
`java.vm.vendor`	`:`	`Sun Microsystems Inc.`
`java.vendor.url`	`:`	`http://java.sun.com/`
`path.separator`	`:`	`;`
`java.vm.name`	`:`	`Java HotSpot(TM) Client VM`
`file.encoding.pkg`	`:`	`sun.io`
`user.country`	`:`	`SUN_STANDARD`
`sun.java.launcher`	`:`	`US`
`sun.os.patch.level`	`:`	`Service Pack 4`
`java.vm.specification.name`	`:`	`Java Virtual Machine Specification`
`user.dir`	`:`	`C:\Documents and Settings\Administrator\ My Documents\NetBeansProjects\GetExample`
`java.runtime.version`	`:`	`1.6.0_01-b06`
`java.awt.graphicsenv`	`:`	`sun.awt.Win32GraphicsEnvironment`
`java.endorsed.dirs`	`:`	`C:\Program Files\Java\jdk1.6.0_01\jre\lib\endorsed`
`os.arch`	`:`	`x86`
`java.io.tmpdir`	`:`	`C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\`
`line.separator`	`:`
`java.vm.specification.vendor`	`:`	`Sun Microsystems Inc.`
`user.variant`	`:`
`os.name`	`:`	`Windows 2000`
`sun.jnu.encoding`	`:`	`Cp1252`
`java.library.path`	`:`	`C:\ProgramFiles\Java\jdk1.6.0_01\jre\bin; .; C:\WINNT\Sun\Java\bin;C:\WINNT\system32; C:\WINNT;.;C:\Program Files\Java\jdk1.6.0_01\bin; C:\maven-2.0.7\bin; C:\Program Files\Apache Software Foundation\Tomcat 6.0\bin; C:\Program Files\apache-ant-1.7.1\bin; C:\GNUstep\GNUstep\System\Library\ Headers\Foundation; C:\baadshah\GNUstep\mingw\bin; C:\baadshah\GNUstep\GNUstep\System\Tools`
`java.specification.name`	`:`	`Java Platform API Specification`
`java.class.version`	`:`	`50.0`
`sun.management.compiler`	`:`	`HotSpot Client Compiler`
`os.version`	`:`	`5.0`
`user.home`	`:`	`C:\Documents and Settings\Administrator`
`user.timezone`	`:`
`java.awt.printerjob`	`:`	`sun.awt.windows.WPrinterJob`
`file.encoding`	`:`	`Cp1252`
`java.specification.version`	`:`	`1.6`
`user.name`	`:`	`C:\Documents and Settings\Administrator\My Documents\NetBeansProjects\ GetExample\build\classes`
`java.class.path`	`:`	`Administrator`
`java.vm.specification.version`	`:`	`1.0`
`sun.arch.data.model`	`:`	`C:\Program Files\Java\jdk1.6.0_01\jre`
`java.home`	`:`	`32`
`java.specification.vendor`	`:`	`en`
`user.language`	`:`	`Sun Microsystems Inc.`
`awt.toolkit`	`:`	`sun.awt.windows.WToolkit`
`java.vm.info`	`:`	`mixed mode, sharing`
`java.version`	`:`	`1.6.0_01`
`java.ext.dir`	`:`	`C:\Program Files\Java\jdk1.6.0_01\jre\lib\ext;C:\WINNT\Sun\Java\lib\ext`
`sun.boot.class.path`	`:`	`C:\Program Files\Java\ jdk1.6.0_01\jre\lib\resources.jar;C:\Program Files\Java\ jdk1.6.0_01\jre\lib\rt.jar; C:\Program Files\Java\ jdk1.6.0_01\jre\lib\sunrsasign.jar; C:\Program Files\Java\ jdk1.6.0_01\jre\lib\jsse.jar; C:\Program Files\Java\ jdk1.6.0_01\jre\lib\jce.jar; C:\Program Files\Java\ jdk1.6.0_01\jre\lib\charsets.jar; C:\Program Files\Java\ jdk1.6.0_01\jre\classes`
`java.vendor`	`:`	`Sun Microsystems Inc.`
`file.separator`	`:`	`\`
`java.vendor.url.bug`	`:`	`http://java.sun.com/cgi-bin/bugreport.cgi`
`sun.cpu.endian`	`:`	`UnicodeLittle`
`sun.io.unicode.encoding`	`:`	`little`
`sun.desktop`	`:`	`windows`
`sun.cpu.isalist`	`:`

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