Java Clear the console

Question

Can any body please tell me what code is used for clear screen in Java  For example in C     system  CLS      What code is used in Java for clear screen   Thanks

User · Answer

You can use an emulation of cls with      for  int i   0  i  lt  50    i  System out println

User · Answer

By combining all the given answers  this method should work on all environments  public static void clearConsole         try           if  System getProperty  quot os name quot   contains  quot Windows quot                  new ProcessBuilder  quot cmd quot    quot  c quot    quot cls quot   inheritIO   start   waitFor                      else               System out print  quot  033 143 quot                    catch  IOException   InterruptedException ex

User · Answer

This is how I would handle it  This method will work for the Windows OS case and the Linux Unix OS case  which means it also works for Mac OS X    public final static void clearConsole         try               final String os   System getProperty  os name             if  os contains  Windows                          Runtime getRuntime   exec  cls                      else                       Runtime getRuntime   exec  clear                        catch  final Exception e                    Handle any exceptions            Note that this method generally will not clear the console if you are running inside an IDE

User · Answer

Create a method in your class like this   as  Holger said here    public static void clrscr          Clears Screen in java     try           if  System getProperty  os name   contains  Windows                new ProcessBuilder  cmd     c    cls   inheritIO   start   waitFor            else             Runtime getRuntime   exec  clear          catch  IOException   InterruptedException ex         This works for windows at least  I have not checked for Linux so far  If anyone checks it for Linux please let me know if it works  or not    As an alternate method is to write this code in clrscr     for int i   0  i  lt  80 300  i       Default Height of cmd is 300 and Default width is 80     System out print   b       Prints a backspace   I will not recommend you to use this method

User · Answer

Try the following    System out print   033 143      This will work fine in Linux environment

User · Answer

You need to use JNI    First of all use create a  dll using visual studio  that call system  cls     After that use JNI to use this DDL    I found this article that is nice    http   www planet-source-code com vb scripts ShowCode asp txtCodeId 5170 amp lngWId 2

User · Answer

A way to get this can be print multiple end of lines    n   and simulate the clear screen  At the end clear  at most in the unix shell  not removes the previous content  only moves it up and if you make scroll down can see the previous content   Here is a sample code   for  int i   0  i  lt  50    i  System out println

User · Answer

Since there are several answers here showing non-working code for Windows  here is a clarification   Runtime getRuntime   exec  cls      This command does not work  for two reasons    There is no executable named cls exe or cls com in a standard Windows installation that could be invoked via Runtime exec  as the well-known command cls is builtin to Windows    command line interpreter  When launching a new process via Runtime exec  the standard output gets redirected to a pipe which the initiating Java process can read  But when the output of the cls command gets redirected  it doesn   t clear the console    To solve this problem  we have to invoke the command line interpreter  cmd  and tell it to execute a command   c cls  which allows invoking builtin commands  Further we have to directly connect its output channel to the Java process    output channel  which works starting with Java  7  using inheritIO     import java io IOException   public class CLS       public static void main String    arg  throws IOException  InterruptedException           new ProcessBuilder  cmd     c    cls   inheritIO   start   waitFor              Now when the Java process is connected to a console  i e  has been started from a command line without output redirection  it will clear the console

User · Answer

You can use following code to clear command line console   public static void clearScreen           System out print   033 H 033 2J          System out flush            For further references visit  http   techno-terminal blogspot in 2014 12 clear-command-line-console-and-bold html

User · Answer

This will work if you are doing this in Bluej or any other similar software   System out print   u000C

User · Answer

If you want a more system independent way of doing this  you can use the JLine library and ConsoleReader clearScreen     Prudent checking of whether JLine and ANSI is supported in the current environment is probably worth doing too   Something like the following code worked for me   import jline console ConsoleReader   public class JLineTest       public static void main String    args      throws Exception               ConsoleReader r   new ConsoleReader             while  true                        r println  Good morning                r flush                 String input   r readLine  prompt gt                  if   clear  equals input                   r clearScreen                else if   exit  equals input                   return              else                 System out println  You typed      input                               When running this  if you type  clear  at the prompt it will clear the screen   Make sure you run it from a proper terminal console and not in Eclipse

User · Answer

Runtime getRuntime   exec cls  did NOT work on my XP laptop   This did -  for int clear   0  clear  lt  1000  clear             System out println   b           Hope this is useful

User · Answer

You need to use control characters as backslash   b  and carriage return   r   It come disabled by default  but the Console view can interpret these controls  Windows gt Preferences and Run Debug  gt  Console and select Interpret ASCII control characteres to enabled it  After these configurations  you can manage your console with control characters like   t - tab   b - backspace  a step backward in the text or deletion of a single character    n - new line   r - carriage return      f - form feed   More information at  https   www eclipse org eclipse news 4 14 platform php

User · Answer

Try this  only works on console  not in NetBeans integrated console  public static void cls        try         if  System getProperty  quot os name quot   contains  quot Windows quot             new ProcessBuilder  quot cmd quot    quot  c quot                       quot cls quot   inheritIO   start   waitFor         else          Runtime getRuntime   exec  quot clear quot          catch  IOException   InterruptedException ex

[java] Java: Clear the console

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