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 Executing a CommandSee 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) {
}
e90. Reading Output from a Commandtry {
// Execute command
String command = "ls";
Process child = Runtime.getRuntime().exec(command);

// Get the input stream and read from it
InputStream in = child.getInputStream();
int c;
while ((c = in.read()) != -1) {
process((char)c);
}
in.close();
} catch (IOException e) {
}

e91. Sending Input to a Commandtry {
// Execute command
String command = "cat";
Process child = Runtime.getRuntime().exec(command);

// Get output stream to write from it
OutputStream out = child.getOutputStream();

out.write("some text".getBytes());
out.close();
} catch (IOException e) {
}