The Java Developers Almanac 1.4


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Home > List of Packages > java.lang  [58 examples] > Commands  [3 examples]

e89. Executing a Command

See also e90 Reading Output from a Command.
    try {
        // Execute a command without arguments
        String command = "ls";
        Process child = Runtime.getRuntime().exec(command);
    
        // Execute a command with an argument
        command = "ls /tmp";
        child = Runtime.getRuntime().exec(command);
    } catch (IOException e) {
    }
If an argument contain spaces, it is necessary to use the overload that requires the command and its arguments to be supplied in an array:
    try {
        // Execute a command with an argument that contains a space
        String[] commands = new String[]{"grep", "hello world", "/tmp/f.txt"};
        commands = new String[]{"grep", "hello world", "c:\\Documents and Settings\\f.txt"};
        Process child = Runtime.getRuntime().exec(commands);
    } catch (IOException e) {
    }

 Related Examples
e90. Reading Output from a Command
e91. Sending Input to a Command

See also: Arrays    Assertions    Classes    Numbers    Objects    Strings    System Properties    Threads   


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