Q:

Eclipse not running after upgrading to Oracle JDK 1.7? 

I upgraded from open-jdk to Oracle JDK 1.7 today.  Since then my eclipse isn't running.  And when I run eclipse i get the following error:-

Below are the logs from the file mentioned in the screenshot:-
buffer@ankit:~/.eclipse/org.eclipse.platform_3.7.0_155965261/configuration$ cat 1353661258260.log 
! SESSION 2012-11-23 14:30:57.677 -----------------------------------------------
eclipse.buildId=I20110613-1736
java.version=1.7.0_09
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_IN
Command-line arguments:  -os linux -ws gtk -arch x86_64

! ENTRY org.eclipse.osgi 4 0 2012-11-23 14:31:03.518
! MESSAGE Application error
! STACK 1
java.lang. UnsatisfiedLinkError: Could not load SWT library.  Reasons: 
    no swt-gtk-3740 in java.library.path
    no swt-gtk in java.library.path
    Can't load library: /home/buffer/.swt/lib/linux/x86_64/libswt-gtk-3740.so
    Can't load library: /home/buffer/.swt/lib/linux/x86_64/libswt-gtk.so

    at org.eclipse.swt.internal. Library.loadLibrary(Library.java:285)
    at org.eclipse.swt.internal. Library.loadLibrary(Library.java:194)
    at org.eclipse.swt.internal. C.<clinit>(C.java:21)
    at org.eclipse.swt.internal. Converter.wcsToMbcs(Converter.java:63)
    at org.eclipse.swt.internal. Converter.wcsToMbcs(Converter.java:54)
    at org.eclipse.swt.widgets. Display.<clinit>(Display.java:132)
    at org.eclipse.ui.internal. Workbench.createDisplay(Workbench.java:695)
    at org.eclipse.ui. PlatformUI.createDisplay(PlatformUI.java:161)
    at org.eclipse.ui.internal.ide.application. IDEApplication.createDisplay(IDEApplication.java:153)
    at org.eclipse.ui.internal.ide.application. IDEApplication.start(IDEApplication.java:95)
    at org.eclipse.equinox.internal.app. EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor. EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor. EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor. EclipseStarter.run(EclipseStarter.java:344)
    at org.eclipse.core.runtime.adaptor. EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect. NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect. NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect. DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect. Method.invoke(Method.java:601)
    at org.eclipse.equinox.launcher. Main.invokeFramework(Main.java:622)
    at org.eclipse.equinox.launcher. Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher. Main.run(Main.java:1410)
    at org.eclipse.equinox.launcher. Main.main(Main.java:1386)

A:

You can try OpenJDK 7 also.  I think it works with openjdk. 
apt-get install openjdk-7-jdk

EDIT
See if this helps you
https://stackoverflow.com/questions/10165693/eclipse-cannot-load-swt-libraries
The solution mentioned there is:
For 32bit:
ln -s /usr/lib/jni/libswt-* ~/.swt/lib/linux/x86/

For 64bt:
ln -s /usr/lib/jni/libswt-* ~/.swt/lib/linux/x86_64/

