Ubuntu启动 eclipse 失败 JVM terminated. Exit code=13

错误码:

JVM terminated. Exit code=13
/usr/java/jdk1.8.0_20/bin/java
-Dosgi.requiredJavaVersion=1.7
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m
-jar /opt/eclipse//plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
-os linux
-ws gtk
-arch x86_64
-showsplash /opt/eclipse//plugins/org.eclipse.platform_4.5.0.v20150603-2000/splash.bmp
-launcher /opt/eclipse/eclipse
-name Eclipse
--launcher.library /opt/eclipse//plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.300.v20150602-1417/eclipse_1612.so
-startup /opt/eclipse//plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar
--launcher.appendVmargs
-exitdata 33800f
-product org.eclipse.epp.package.jee.product
-vm /usr/java/jdk1.8.0_20/bin/java
-vmargs
-Dosgi.requiredJavaVersion=1.7
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m
-jar /opt/eclipse//plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar

jdk和eclipse均为64位..系统为Ubuntu 15.04