CODEWITHSUNDEEP
java
Jatin
Jatin

Reputation: 31724

weird behavior with white-spaces on path

I have this stupid unknown behavior coming up. In my application I need to start a Java process to execute some task's. So on doing below:

1a) String[] ls = {"cmd",
                "/C",
                "\"C:\\t e m p\\run time\\jre\\bin\\java.exe\"",
                "-jar",
                "Canon.jar"};
ProcessBuilder p = new ProcessBuilder(ls);
p.redirectErrorStream();
Process pp = p.start();

The above works perfectly. But if say full-path to Canon.jar contains white-spaces then it doesn't work. Basically I need to add quotes around the Canon.jar path. i.e.

1b) String[] ls = {"cmd","/C",
                "\"C:\\Prac\\t e m p\\run time\\jre\\bin\\java.exe\"","-jar",
                 "\"C:\\Prac\\t e m p\\Canon.jar\""};

The above still doesn't work even after including quotes. It says:

Ending 'C:\Users\Jatin\Documents\Prac\t' is not recognized as an internal or external command, operable program or batch file.

The biggest problem is, the below also does not work:

 1c) String[] ls = {"cmd","/C",
                "\"C:\\Prac\\t e m p\\run time\\jre\\bin\\java.exe\"","-jar",
                 "\"C:\\Prac\\temp\\Canon.jar\""};//contains no white space.

It still says same error. How on earth can it say it again when path to Canon.jar contains no white spaces. Why does it say problem with java.exe path when 1a worked.

Upvotes: 3

Views: 300

Answers (1)

devnull
devnull

Reputation: 123508

Do you really need the cmd at all? Consider removing it.

ProcessBuilder p = new ProcessBuilder(new String[]{"C:\\Prac\\t e m p\\run time\\jre\\bin\\java.exe","-jar",
               "C:\\Prac\\t e m p\\Canon.jar"};

Upvotes: 2

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