Missing tools.jar when launching STS application

Question

i have the latest STS4.I am using installed java-1.8 jdk NOT embedded as the execution environment. My project just runs fine without any issue.

However when I launch the STS application itself I have a pop up saying "Missing tools.jar" I have already tried

1. I have tried pointing JAVA_HOME to different Jdk
2. added -vm args in the .ini file.

Yet I cannot get rid of this pop up.

Answer 1

I have STS4 so I have modified SpringToolSuite4.ini

I changed from:

[...]
--launcher.defaultAction
openFile
-vmargs
-Dosgi.requiredJavaVersion=1.8
[...]

to exactly this

[...]
--launcher.defaultAction
openFile
-vm
C:\Program Files\Java\jdk1.8.0_152\bin\javaw.exe
-vmargs
-Dosgi.requiredJavaVersion=1.8
[...]

And the message dissapeared

Answer 2

I solved this same problem by modifying the file "eclipse.ini". First I tried to solve it by modifying the file SpringToolSuite4.ini, but nothing happened, because I previusly had installed the eclipse ide, and the change in SpringToolSuite4.ini didn't work. then I modified the file eclipse.ini; and it worked.

The changes that I did in eclipse.ini are detailed below:

To check with what Java version (JRE or JDK) Eclipse is running, do the following:

• Open the menu item Help > About Eclipse. (On the Mac, it’s in the Eclipse-menu, not the Help-menu)
• Click on Installation Details.
• Switch to the tab Configuration
• Search for a line that starts with -vm. The line following it shows which Java binary is used.

Depending on the name and location of the used Java binary one can figure out if a JRE or a JDK is used:

• If the path contains “jre” (e.g. as in C:\Program Files\Java\jre6\bin\client\jvm.dll) it is a JRE
• If the path contains “jdk” (e.g. as in C:\Program Files\Java\jdk1.6.0_31\bin\javaw.exe) it is a JDK.

If no JDK is used for Eclipse, change it:

• Quit Eclipse if it is running
• Go to the Eclipse installation directory and open the file eclipse.ini in a text editor.
• Search for the line -vmargs

• Before the line -vmargs, add two lines:

  On the first line, write -vm

  On the second line, write the path to your JDK installation (usually something like: C:\Program Files\Java\jdk1.6.0_31\bin\javaw.exe on Windows)*

source: https://matsim.org/docs/devguide/eclipse/jdk

Answer 3

The fix is in the -vm parameter. the order and the absolute path of the javaw.exe seems to be the issue.

the readme file mentions _ "To run Eclipse with an alternate Java runtime environment, the path to the Java virtual machine's binary must be identified. With an Eclipse installation from the distribution, altering the $PATH variable to include the path to the alternate Java runtime environment is often not enough as the Eclipse that Linux distributions package often performs a scan internally to pick up GCJ by itself whilst ignoring what's on the $PATH."

So I have edited now the SpringToolSuite4.ini and made this entry

  -vm
 C:\UserTemp\Softwares\java\jdk\oracle-jdk-1.8-64bit\bin\javaw.exe

Restarted my STS and it works perfect.

The reference to set the JVM Specifying the JVM was very useful in understanding this.

Answer 4

In my case I had installed jre, and not jdk!

Observe that you have jdk installed!