java.util.zip.ZipException: duplicate entry with jar command
So I have these classes which im trying to compress into an executable jar file using java's built in javac and jar commands. All the files compile fine without any errors, however; when I try to jar the files using the following command: jar cfe Project2.jar -cp . SimpleMain.class Connection.class Frame.class Listener.class SimpleNode.class SimpleNode$connectionType.class SimpleNode$Failure.class SimpleNode$nodeName.class Switch.class, the program throws a ZipException at me and crashes which in turn produces a corrupt jar file which I am unable of extracting any sort of information from using jar tvf Project2.jar.
The exception thrown:
java.util.zip.ZipException: duplicate entry: SimpleMain.class
at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:232)
at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:109)
at sun.tools.jar.Main.addFile(Main.java:839)
at sun.tools.jar.Main.create(Main.java:545)
at sun.tools.jar.Main.run(Main.java:214)
at sun.tools.jar.Main.main(Main.java:1288)
java jar
asked Nov 12 '18 at 3:38
OhunterOhunter
816
|
show 1 more comment
So I have these classes which im trying to compress into an executable jar file using java's built in javac and jar commands. All the files compile fine without any errors, however; when I try to jar the files using the following command: jar cfe Project2.jar -cp . SimpleMain.class Connection.class Frame.class Listener.class SimpleNode.class SimpleNode$connectionType.class SimpleNode$Failure.class SimpleNode$nodeName.class Switch.class, the program throws a ZipException at me and crashes which in turn produces a corrupt jar file which I am unable of extracting any sort of information from using jar tvf Project2.jar.
The exception thrown:
java.util.zip.ZipException: duplicate entry: SimpleMain.class
at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:232)
at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:109)
at sun.tools.jar.Main.addFile(Main.java:839)
at sun.tools.jar.Main.create(Main.java:545)
at sun.tools.jar.Main.run(Main.java:214)
at sun.tools.jar.Main.main(Main.java:1288)
java jar
asked Nov 12 '18 at 3:38
OhunterOhunter
816
-cpis not a valid option for thejarcommand. You are adding both the files in the current directory (.) and addingSimpleMain.classexplicitly, which is the reason for the duplicate entry. Solution: remove-cp .from the command.
– VGR
Nov 12 '18 at 3:47
if I do that, I am presented withError: Could not find or load main class SimpleMain.class. For other projects I have the-cp .have fixed that
– Ohunter
Nov 12 '18 at 3:50
Theeincfespecifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove theeor change the command tojar cfe Project2.jar SimpleMain SimpleMain.class ….
– VGR
Nov 12 '18 at 3:57
Even when replacing the-cp .withSimpleMain, I am faced with the same error of not finding the main class. Any idea why?
– Ohunter
Nov 12 '18 at 4:11
When you run the Java program, you should not specify the.classpart.java -cp Project2.jar SimpleMainis correct. There should be no “.class” in the command that runs the program.
– VGR
Nov 12 '18 at 4:14
|
show 1 more comment
So I have these classes which im trying to compress into an executable jar file using java's built in javac and jar commands. All the files compile fine without any errors, however; when I try to jar the files using the following command: jar cfe Project2.jar -cp . SimpleMain.class Connection.class Frame.class Listener.class SimpleNode.class SimpleNode$connectionType.class SimpleNode$Failure.class SimpleNode$nodeName.class Switch.class, the program throws a ZipException at me and crashes which in turn produces a corrupt jar file which I am unable of extracting any sort of information from using jar tvf Project2.jar.
The exception thrown:
java.util.zip.ZipException: duplicate entry: SimpleMain.class
at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:232)
at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:109)
at sun.tools.jar.Main.addFile(Main.java:839)
at sun.tools.jar.Main.create(Main.java:545)
at sun.tools.jar.Main.run(Main.java:214)
at sun.tools.jar.Main.main(Main.java:1288)
java jar
asked Nov 12 '18 at 3:38
OhunterOhunter
816
So I have these classes which im trying to compress into an executable jar file using java's built in javac and jar commands. All the files compile fine without any errors, however; when I try to jar the files using the following command: jar cfe Project2.jar -cp . SimpleMain.class Connection.class Frame.class Listener.class SimpleNode.class SimpleNode$connectionType.class SimpleNode$Failure.class SimpleNode$nodeName.class Switch.class, the program throws a ZipException at me and crashes which in turn produces a corrupt jar file which I am unable of extracting any sort of information from using jar tvf Project2.jar.
The exception thrown:
java.util.zip.ZipException: duplicate entry: SimpleMain.class
at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:232)
at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:109)
at sun.tools.jar.Main.addFile(Main.java:839)
at sun.tools.jar.Main.create(Main.java:545)
at sun.tools.jar.Main.run(Main.java:214)
at sun.tools.jar.Main.main(Main.java:1288)
java jar
java jar
asked Nov 12 '18 at 3:38
OhunterOhunter
816
asked Nov 12 '18 at 3:38
OhunterOhunter
816
asked Nov 12 '18 at 3:38
OhunterOhunter
816
asked Nov 12 '18 at 3:38
OhunterOhunter
816
asked Nov 12 '18 at 3:38
OhunterOhunter
816
816
-cpis not a valid option for thejarcommand. You are adding both the files in the current directory (.) and addingSimpleMain.classexplicitly, which is the reason for the duplicate entry. Solution: remove-cp .from the command.
– VGR
Nov 12 '18 at 3:47
if I do that, I am presented withError: Could not find or load main class SimpleMain.class. For other projects I have the-cp .have fixed that
– Ohunter
Nov 12 '18 at 3:50
Theeincfespecifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove theeor change the command tojar cfe Project2.jar SimpleMain SimpleMain.class ….
– VGR
Nov 12 '18 at 3:57
Even when replacing the-cp .withSimpleMain, I am faced with the same error of not finding the main class. Any idea why?
– Ohunter
Nov 12 '18 at 4:11
When you run the Java program, you should not specify the.classpart.java -cp Project2.jar SimpleMainis correct. There should be no “.class” in the command that runs the program.
– VGR
Nov 12 '18 at 4:14
|
show 1 more comment
-cpis not a valid option for thejarcommand. You are adding both the files in the current directory (.) and addingSimpleMain.classexplicitly, which is the reason for the duplicate entry. Solution: remove-cp .from the command.
– VGR
Nov 12 '18 at 3:47
if I do that, I am presented withError: Could not find or load main class SimpleMain.class. For other projects I have the-cp .have fixed that
– Ohunter
Nov 12 '18 at 3:50
Theeincfespecifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove theeor change the command tojar cfe Project2.jar SimpleMain SimpleMain.class ….
– VGR
Nov 12 '18 at 3:57
Even when replacing the-cp .withSimpleMain, I am faced with the same error of not finding the main class. Any idea why?
– Ohunter
Nov 12 '18 at 4:11
When you run the Java program, you should not specify the.classpart.java -cp Project2.jar SimpleMainis correct. There should be no “.class” in the command that runs the program.
– VGR
Nov 12 '18 at 4:14
-cp is not a valid option for the jar command. You are adding both the files in the current directory (.) and adding SimpleMain.class explicitly, which is the reason for the duplicate entry. Solution: remove -cp . from the command.– VGR
Nov 12 '18 at 3:47
-cp is not a valid option for the jar command. You are adding both the files in the current directory (.) and adding SimpleMain.class explicitly, which is the reason for the duplicate entry. Solution: remove -cp . from the command.– VGR
Nov 12 '18 at 3:47
if I do that, I am presented with
Error: Could not find or load main class SimpleMain.class. For other projects I have the -cp . have fixed that– Ohunter
Nov 12 '18 at 3:50
if I do that, I am presented with
Error: Could not find or load main class SimpleMain.class. For other projects I have the -cp . have fixed that– Ohunter
Nov 12 '18 at 3:50
The
e in cfe specifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove the e or change the command to jar cfe Project2.jar SimpleMain SimpleMain.class ….– VGR
Nov 12 '18 at 3:57
The
e in cfe specifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove the e or change the command to jar cfe Project2.jar SimpleMain SimpleMain.class ….– VGR
Nov 12 '18 at 3:57
Even when replacing the
-cp . with SimpleMain, I am faced with the same error of not finding the main class. Any idea why?– Ohunter
Nov 12 '18 at 4:11
Even when replacing the
-cp . with SimpleMain, I am faced with the same error of not finding the main class. Any idea why?– Ohunter
Nov 12 '18 at 4:11
When you run the Java program, you should not specify the
.class part. java -cp Project2.jar SimpleMain is correct. There should be no “.class” in the command that runs the program.– VGR
Nov 12 '18 at 4:14
When you run the Java program, you should not specify the
.class part. java -cp Project2.jar SimpleMain is correct. There should be no “.class” in the command that runs the program.– VGR
Nov 12 '18 at 4:14
|
show 1 more comment
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-cpis not a valid option for thejarcommand. You are adding both the files in the current directory (.) and addingSimpleMain.classexplicitly, which is the reason for the duplicate entry. Solution: remove-cp .from the command.– VGR
Nov 12 '18 at 3:47
if I do that, I am presented with
Error: Could not find or load main class SimpleMain.class. For other projects I have the-cp .have fixed that– Ohunter
Nov 12 '18 at 3:50
The
eincfespecifies that the argument after the jar file name will be the jar’s main class for execution. This means that the first argument following the jar file name is treated as a class name and is not added to the .jar file. Either remove theeor change the command tojar cfe Project2.jar SimpleMain SimpleMain.class ….– VGR
Nov 12 '18 at 3:57
Even when replacing the
-cp .withSimpleMain, I am faced with the same error of not finding the main class. Any idea why?– Ohunter
Nov 12 '18 at 4:11
When you run the Java program, you should not specify the
.classpart.java -cp Project2.jar SimpleMainis correct. There should be no “.class” in the command that runs the program.– VGR
Nov 12 '18 at 4:14