Make a JAR executable In the manifest file of a JAR, it is possible to specify the class to be used when the JVM is lauched with the JAR as parameter. The class must have a main(). Try with this simple class import java.awt.*; import java.awt.event.*;public class MyClass { public static void main(String[] args) { Frame f = new Frame(); f.addWindowListener (new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } } ); f.add(new Label("Hello world")); f.setSize(200,200); f.setVisible(true); } } Then create this manifest file (manifest.mft) with any text editor. Manifest-Version: 1.0 Main-Class: MyClass Classpath: .\MyJar.jar
Next, you include the manifest file in the JAR (MyJar.jar) with the MyClass class. jar cvfm MyJar.jar manifest.mft MyClass.class
Then you are able to start the MyClass.class by double-clicking on the MyJar.jar file (if the JRE is correctly installed) or by typing java -jar MyJar.jar
On NT, you can also make JARs run from the command-line by setting the PATHEXT environment variable, for example set PATHEXT=.EXE;.BAT;.CMD;.JAR Then if you have the jar file MyJar.jar accessible via the PATH environment variable, typing "MyJar" on the DOS command line will invoke "java -jar MyJar.jar" .
In the manifest file of a JAR, it is possible to specify the class to be used when the JVM is lauched with the JAR as parameter. The class must have a main().
Try with this simple class import java.awt.*;
import java.awt.event.*;public class MyClass {
public static void main(String[] args) {
Frame f = new Frame();
f.addWindowListener
(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}
);
f.add(new Label("Hello world"));
f.setSize(200,200);
f.setVisible(true);
}
}
Then create this manifest file (manifest.mft) with any text editor. Manifest-Version: 1.0
Main-Class: MyClass
Classpath: .\MyJar.jar
Next, you include the manifest file in the JAR (MyJar.jar) with the MyClass class. jar cvfm MyJar.jar manifest.mft MyClass.class
Then you are able to start the MyClass.class by double-clicking on the MyJar.jar file (if the JRE is correctly installed) or by typing java -jar MyJar.jar
On NT, you can also make JARs run from the command-line by setting the PATHEXT environment variable, for example set PATHEXT=.EXE;.BAT;.CMD;.JAR
Then if you have the jar file MyJar.jar accessible via the PATH environment variable, typing "MyJar" on the DOS command line will invoke "java -jar MyJar.jar" .