"intelligently" parsing user input arguments I have a program where commands are executed through Runtime.getRuntime().exec(cmdArray[]). The user can append additional switches to these commands by entering them in a textbox.  Example:  cmdArray[] = {"someprogram", "--something", "123"} //this is the initial command //textbox is   -A "bla bla bla"   notice the quotes  //do something...  cmdArray[] = {"someprogram", "--something", "123", "-A", "bla bla bla"} //parsed array   Is there a java function that would allow me to do this? or do I have to write it myself (sounds tedious since I have to handle the single and double quotes, all the escaping etc...)?  Thanks  EDIT: Didn't want the extra dependency so I wrote a simple method, it doesn't cover everything but it does what I want  public String[] getCmdArray(String cmd) { // Parses a regular command line and returns it as a string array for use with Runtime.exec()     ArrayList&lt;String&gt; cmdArray = new ArrayList&lt;String&gt;();     StringBuffer argBuffer = new StringBuffer();     char[] quotes = {'"', '\''};     char currentChar = 0, protect = '\\', separate = ' ';     int cursor = 0;     cmd = cmd.trim();     while(cursor &lt; cmd.length()) {         currentChar = cmd.charAt(cursor);          // Handle protected characters         if(currentChar == protect) {             if(cursor + 1 &lt; cmd.length()) {                 char protectedChar = cmd.charAt(cursor + 1);                 argBuffer.append(protectedChar);                 cursor += 2;             }             else                 return null; // Unprotected \ at end of cmd         }          // Handle quoted args         else if(inArray(currentChar, quotes)) {             int nextQuote = cmd.indexOf(currentChar, cursor + 1);             if(nextQuote != -1) {                 cmdArray.add(cmd.substring(cursor + 1, nextQuote));                 cursor = nextQuote + 1;             }             else                 return null; // Unprotected, unclosed quote         }          // Handle separator         else if(currentChar == separate) {             if(argBuffer.length() != 0)                 cmdArray.add(argBuffer.toString());             argBuffer.setLength(0);             cursor++;         }          else {             argBuffer.append(currentChar);             cursor++;         }     }      if(currentChar != 0) // Handle the last argument (doesn't have a space after it)         cmdArray.add(argBuffer.toString());      return cmdArray.toArray(new String[cmdArray.size()]); }  public boolean inArray(char needle, char[] stack) {     for(char c : stack)         if(needle == c)             return true;     return false; }
How do I parse command line arguments in Java? What is a good way of parsing command line arguments in Java?
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