How to open Console window in Eclipse?

I accidentally closed the Console window in Eclipse, and now I can’t see the result of my code being run.

How do you open it again?

15 Answers 15

From the menu bar, Window → Show View → Console. Alternately, use the keyboard shortcut:

• Mac: Option — Command — Q , then C , or
• Windows: Alt — Shift — Q , then C

the only solution for me was:

click on window->close all perspective (you can try also close perspective)

after this, in the top right corner click on: open perspective->resource

Just open the Window(in eclipse IDE) -> click on Reset Perspective. It worked for me.

The «trim stack» is a vertical icon bar that should appear, if it isn’t there already, on one side of the main window. Back when this answer was originally written, it was down the left hand side (of which I had a screen shot that unfortunately was uploaded to some image paste bin place and not Stack Overflow, then linked, and has since been lost). Not being much of an eclipse user currently I don’t know if this is still the case.

It contains icons for each sub-window that is minimized, so if none of them are minimized, there is no trim stack. Try minimizing the Package Explorer/Navigator window and you should see it appear. You can then click the «Restore» icon (the overlapping squares at the top) in the trim stack to get the window back.

BUT — and it’s not consistent — sometimes with Eclipse Juno when the window with the Console, etc, is minimized and there is no trim stack, the trim stack doesn’t appear and using «Show View» does nothing. The way around that I’ve found is to minimize some other window, then the trim stack appears and the Console icon (blue & white monitor square) appears. Click that and the Console, etc. appears in a pop-up. Click the Restore icon in that pop-up and it will become part of the main window again.

Eclipse Console not showing output

I have written a simple class having an SOP statement for «Hello World». But the Eclipse console is not showing output. I then wrote the same program in a previously created project and it worked fine. I am opening the Console as given below:

But it is not working. I am using j2ee project in the same workspace. Any idea? Please help. I am stuck because of this problem.

13 Answers 13

Go to «Window > Reset Perspective», that will reset the window settings to default. Next, you might need to stop any running Java processes. I suggest you then click «Remove all Terminated Launches» and if the red «Terminate All» is still available click that as well

Make sure that the project structure should be as follows:

Make sure that your System.out.println(«Hello World») is in main method with proper signature.

[working] I encountered the same problem, I tried with all the solutions provided above but it didn’t work then I came to a solution which worked. Follow the following process to overcome the problem.

Right click on workspace provided by Eclipse —> Select «Run As» —> Java Application.

This will work definitely.

None of the above. What helped in my case:

Run > Run configurations > Common > uncheck Launch in background (last tab all the way at the bottom).

Then it showed the error why the thing wouldnt start.

In my case: a project dependency to a project which I had closed.

See (rightclick) Project > Build path > Configure build path.

How do I increase the capacity of the Eclipse output console?

Even with the «scroll lock» option enabled for the Eclipse console, eventually it overfills and starts auto-scrolling on me.

Is there some way of increasing the capacity of the console so that it stores more lines? I wasn’t able to find the option.

9 Answers 9

Under Window > Preferences , go to the Run/Debug > Console section, then you should see an option «Limit console output.» You can uncheck this or change the number in the «Console buffer size (characters)» text box below.

(This is in Galileo, Helios CDT, Kepler, Juno, Luna, Mars, Neon, Oxygen and 2018-09)

Open the Windows > Preferences menu.

Expand the Run/Debug > Console preferences.

Set the Console buffer size (characters) to something much bigger. 2147383647 /

2GB is the upper limit (or 1000000 /

1MB in older releases). Or just uncheck the Limit console output .

For CDT users / C/C++ build, also adjust the setting

in Window > Preferences

under C/C++ > Build > Console (!)

(This time in number of lines.)

This also affects the «CDT Global Build Console».

Alternative

If your console is not empty, right click on the Console area > Preferences. > change the value for the Console buffer size (characters) (recommended) or uncheck the Limit console output (not recommended):

Eclipse console doesn’t show the whole output

In Java I tried to write a String as an output to the console. The length of the String is 20166 characters. After printing the string to the console only second half of the String appears.

The whole string is one long line:

What it looks like: From the beginning there is a lot of whitespaces (which are supposed to be alphanumeric characters) and after that there is the rest of the string displayed properly.

I tried to change console encoding from default to UTF-16 and UTF-8, but it didn’t help.

The String I am trying to output is text content crawled from a specific webpage (http://docs.jquery.com/Tutorials:Getting_Started_with_jQuery). If I crawl a different webpage there is no problem.

How I process the string: I use a webservice to get the text content from the webpage. The returned String (text contet) is printed properly (whole). I need to process this string so I change all characters to lowercase and replace all multiple whitespaces with the single one.

After lowercasing the characters I am still able to print whole string properly, but after replacing the multiple whitespaces with one, the beginning of string is not visible.

Do you have any idea what the problem is?

Thakns in advance for any help.

3 Answers 3

What are the preferences for the console? Especially check the settings «Fixed width console» plus «Limit console output». Maybe your console simply can’t hold that many characters in one line.

In Eclipse if you go to preference and in the drop-down, you can see RUN/DEBUG option if you click on that RUN/DEBUG drop-down you can see the console button and there you can adjust the «Fixed width console» plus «Limit console output»

[EDIT] Now Eclipse eventually has to cut the data in the console since it doesn’t have infinite amounts of memory. If the console is still cut off, you can use this trick: Open the «Run Configurations» dialog (Found in the drop down menu for the green «run» button).

The tab «Common» tab has options in the «Standard Input and Output» group at the bottom to save a copy of all output in a file. You can then use your OSs tools to examine this file.

Also note that very long lines can make Eclipse slow (i.e. it can hang for a couple of seconds). This is due to a bug in the regexp matching patterns for Exception stack traces. If that happens, limit the line length to 1000 characters or less.

This is especially a problem with Spring which sometimes creates exceptions that have 50’000 characters in the message.

If you have a similar problem with the CDT Global Build Console, see here: Eclipse CDT Build Console output not displaying entire compiler output

C++ program written in Eclipse using Windows and MinGW cannot display output to console view

I’m using Windows 7 64bit.

I installed eclipse version 3.6.2, cdt, and MinGW. I have a C++ console program in Eclipse as follows:

If I run this console program, it should display Hello world to Console View in Eclipse, but nothing displays.

If I go to the debug folder and run the exe, it does print to the console.

If I make some syntax mistake, then the Eclipse Console View will show something, such as:

Why is nothing showing in the Eclipse console view and how can I make my C++ console program display output?

13 Answers 13

At that link, look at the reply from «No real Name».

In case the link goes down, here is the content:

The problem is that your program uses dll libraries from MinGW — try to start the exe file manually, it will report some error about missing dlls.

Solution can be, that you copy required dlls to .exe file in your project directory (and Release or Debug subdirectory, depends on what .exe are you executing with Run command).

Or, in menu Run -> Run Configuration select the configuration which you use for that .exe file (or create a new C/C++ Application configuration) and select Environment tab in the right panel. There add new variable named PATH with value c:\MinGW\bin (this is default path to mingw\bin directory, use a path valid for your instalation if it’s somewhere else)
Edit: Now I’m looking at post by Vikyboss and it’s in fact the same — setting the PATH variable in Run configuration. Setting PATH variable in Preferences > C/C++ (Expand it) > Environment as described by Sydraps didn’t work for me.

But I think that static linking that libraries may be the best solution for you. In menu Project -> Properties select C/C++ Build -> Settings. In the right panel select Configuration which you want to change (you may select All). In the tab Tool Settings select MinGW C++ Linker -> Miscellaneous and in the right panel in the Linker flags type -static. Now the .exe will be bloated by the size of the libraries (in my case approx. +900kB for Hello world example, requiring 2 dlls), but it will be independent at any libraries.

I hope this will be helpful for anyone trying to start with Eclipse C/C++ and wondering why there’s no Hello world in console. Ales Chlubny