I would like to modify the output printed by System.out.println();. How is this possible? It is possible - I've seen it in Bukkit/Craftbukkit. If a plugin is printing a string with System.out.println(String string); Bukkit adds a time/date and logging status to the string. I would like to do the same like Bukkit.
You can change the PrintStream that is used as the standard output:
System.setOut(PrintStream out)
Create your own PrintStream implementation which prints whatever extra info you want to the (old) standard output, and set it with:
System.setOut(myStream);
Example:
The following example prints the current time millis before each printed String that is printed with PrintStream.println(String x) method:
PrintStream myStream = new PrintStream(System.out) {
@Override
public void println(String x) {
super.println(System.currentTimeMillis() + ": " + x);
}
};
System.setOut(myStream);
System.out.println("Hello World!");
Output:
1420553422337: Hello World!
Note:
This example only overrides the PrintStream.println(String x) method, so calling other print methods of PrintStream would not add the time stamp to the output.
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