text base programs in java

Question

i want to create a terminal application in java, but i don't know how to replace text lines that are already printed (kind of "edit the lines that already printed"). \r only returns to the beginning of the last line, and i want to display a 2 dimensional grid. this is a sample for what i want to print:

System.out.println("################");
System.out.println("#--------------#");
System.out.println("#--------------#");
System.out.println("################");


System.out.println("\r################");
System.out.println("#-------X------#");
System.out.println("#--------------#");
System.out.println("################");

You can clear the screen, or use terminal escape sequences to move the cursor around. Also look into `curses`. — Jonathon Reinhart, Apr 28 '14 at 07:02

score 0 · Answer 1 · edited May 23 '17 at 10:26

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Using System.out.println whatever text is printed to the console is already flushed and cannot be edited. What you can do is you can clear the console and reprint using a fresh set Sys Outs. But for a graphical application I would suggest you have a look at JAVA AWT which will give you functions like paint() and repaint() and other rich UI functions.

For clearing the console you can refer to this: clear console

For JAVA AWT: AWT tutorial

edited May 23 '17 at 10:26

Community

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answered Apr 28 '14 at 07:06

Pratik Shelar

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I know to use awt, i just got loved in the terminal when started working with linux. – Bary12 Apr 28 '14 at 07:11
Then you can write your own repaint method where you clear the console and reprint the updated output. – Pratik Shelar Apr 28 '14 at 07:14
I took a look at other stackoverflow questions, and found this: runtime.getRuntime().exec("cls"); that should clear the terminal. – Bary12 Apr 28 '14 at 07:20
It is OS dependent though. it will surely work for windows. Also you can have a look at JLine library as @faisalbhagat suggested. it has methods like clearconsole etc.. – Pratik Shelar Apr 28 '14 at 07:27

score 0 · Accepted Answer · answered Apr 28 '14 at 07:21

0

you should try JLine library. It provides many userful functions for command line applications. http://jline.sourceforge.net/javadoc/

answered Apr 28 '14 at 07:21

faisalbhagat

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text base programs in java

2 Answers2