Eclipse does not highlight matching variables

Question

Eclipse does not highlight matching variables for me     I ve already tried to change  Mark occurrences  via  Window - gt  Preferences - gt  Java - gt  Editor - gt  Mark Occurrences   but it didn t work  I am not sure why this is not working while others  have been able to fix the problem   Can anyone tell me how can I set highlighting matching variables    Looking for same variables with my eyes really bothering me too much

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This is what worked for me  credit to YardenST from another thread   Instead of double clicking file when opening  right click on file -  Open with -  Java editor

User · Answer

Sometimes problems in your project build path can cause this  make sure you resolve it first  in my case the prolem was      And when fix it highlights come back

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I was having the same issue and the  make occurrences  and  annotations  solutions above did not help  If you are using Maven  I had to convert the project to a Maven project  right click on it in the Package Explorer and go down to configure   then build the project  Then the syntax coloring and highlighting worked correctly

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Eclipse Toolbar   Windows   Preferences   General  Right side    Editors  Right side    Text Editors  Right side    Annotations  Right side   For Occurrences and Write Occurrences  make sure you DO have the  Text as highlighted  option checked for all of them  See screenshot below

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For PHP you can set  window  gt  preferences  gt  PHP  gt  editor  gt  mark occurrences    Please check first checkbox  Mark occurrences of selected element in the current file     And also check  Preferences  gt  General  gt  Editors  gt  Text Editors  gt  Annotations    Occurrences  and  Write Occurrences  with different style and color

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I just unchecked all  applied  checked all again  applied and it worked    hopefully helps others

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I had this issue with Eclipse Mars for PHP developers  64 bit edition for Windows  I now discovered that highlighting works out-of-the-box with the 32 bit version  Even with a fresh download of the equivalent 64 bit build  highlighting does not work  So I will switch back to 32 bit  this is actually not the first problem I observe with Eclipse 64 bit    Edit    I thought this was the solution  so I installed the 32 bit version in C  Program Files  x86  and set a shortcut in the  Start  menu  When I started Eclipse from there  highlighting again ceased to work  I now got it working again by deleting the  metadata directory in the workspace  i e  resetting the workspace settings  and re-importing the projects

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There is a bug in Eclipse Juno  and probably others  but I have a workaround   If you have already checked all the configurations mentioned in the top answers here and it s STILL not working try this   To confirm the problem    Select a variable Notice the highlight didn t work Click away from eclipse so the editor loses focus  Click on eclipse s title bar so it regains focus  your variable should be highlighted    If this is happening for you  you must close ALL of your open files and reopen them  This bug seems to also make weird things happen with Ctrl S saving of an individual file  My guess is that something is happening whereby internally eclipse believes a certain file has focus but it actually doesn t  and the UI s state is rendered as though a different file is being edited   Edit  If it s STILL not working  you might need to restart eclipse  but if you don t want to  try selecting the item you want to see occurrences of then disable and re-enable the Mark Occurences Toggle button

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The only that worked for me was   Java  gt  Editor  gt  Mark Occurrences  Check  Mark occurrences of te selected element in the current file       and maybe all the ones below

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Using Alt   Shift   o It works for me

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maybe because it not supports code highlights inside scriplets  not sure though   You can try using one of the eclipse plugin like  glance search  which works great  Here s a link for that- http   code google com p eclipse-glance

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If highlighting is not working for large files  scalability mode has to be off  Properties    c c      Editor   Scalability

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Alt   Shift   o Will solve your problem and agree with  Korhan Ozturk as well    This is known as Toggle Mark occurrence  Alt   Shift   O   Means will highlight all occurrence of focused variable  Same thing can be achieved from tool bar as follows  In same tool bar there is another switch if you turn that on you will see complete path for opened file  That is Breadcrumb  there are some more very useful switches like word wrap  Show white Characters just after toggle mark occurrence

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Try   window  gt  preferences  gt  java  gt  editor  gt  mark occurrences    Select all options available there   Also go to   Preferences  gt  General  gt  Editors  gt  Text Editors  gt  Annotations   Compare the settings for  Occurrences  and  Write Occurrences   Make sure that you don t have the  Text as higlighted  option checked for one of them   This should fix it

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I wish I could have read the response by  J  n Laz  r   In addition to all the configurations mentioned in the accepted answer  below setting solved my misery   For large files the scalability mode must be turned off  Enabling scalability mode will disable reference highlighting     PS   Rob Hruska It would be great if this point is added in the accepted answer  Most of the readers do not bother to read the last response

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For others running into this without any of the above solutions working AND you have modified the default theme  you might want to check the highlight color for occurrences   Preferences   General   Editors   Text Editors   Annotations  Then select Occurrences in the Annotation Types  and change the Color Box to something other than your background color in your editor   You can also change the Highlight to a outline box by Checking  Text as  and selecting  Box  from the drop-down box  which is easier to see various syntax colors then with the highlights

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Java - Editor - Mark Occurrences   Eclipse Java EE IDE for Web Developers  Version  Photon Release  4 8 0

[java] Eclipse does not highlight matching variables

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