Error while Executing Jar File

Question

i created three java files.
One.java
Two.java
Three.java
after that i comiled three files.
i want to compree these files into a jar file.after that i have to execute the jar file.
for that i created a manifest file called mainClass.txt
step1: javac *.java
stpe2: jar cf example.jar
step3:i created a mainfest called mainClass.txt in that i mentioned name of the class that contains main method .
in the above Three.java having main().
Main-Class:Three
and i saved .(only ons statement in the manifest file)
step 4: I then run the jar utility with the following command
jar cmf mainClass.txt example.jar *.class
but i am getting the following Error.
please help me.
java.io.IOException: invalid header field
at java.util.jar.Attributes.read(Attributes.java:387)
at java.util.jar.Manifest.read(Manifest.java:167)
at java.util.jar.Manifest.<init>(Manifest.java:52)
at sun.tools.jar.Main.run(Main.java:124)
at sun.tools.jar.Main.main(Main.java:904)

Answer 1

hi guys
i created three java files.
One.java
Two.java
Three.java
after that i comiled three files.
i want to compree these files into a jar file.after that i have to execute the jar file.
for that i created a manifest file called mainClass.txt
step1: javac *.java
stpe2: jar cf example.jar
step3:i created a mainfest called mainClass.txt in that i mentioned name of the class that contains main method .
in the above Three.java having main().
Main-Class:Three
and i saved .(only ons statement in the manifest file)
step 4: I then run the jar utility with the following command
jar cmf mainClass.txt example.jar *.class
but i am getting the following Error.
java.io.IOException: invalid header field
at java.util.jar.Attributes.read(Attributes.java:387)
at java.util.jar.Manifest.read(Manifest.java:167)
at java.util.jar.Manifest.<init>(Manifest.java:52)
at sun.tools.jar.Main.run(Main.java:124)
at sun.tools.jar.Main.main(Main.java:904)
Thnks in Advance.