java - error after installation of netbeans 7.3.1 -

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hello please start new java me....i download netbeans ide 7.3.1 yesterday after finish installation try run there sample java application got error message.. 

error - ant misconfigured , cannot run. java.io.ioexception: not load class org.netbeans.modules.javame.profiler.ant.openprofiler: java.lang.unsupportedclassversionerror: org/netbeans/modules/javame/profiler/ant/openprofiler : unsupported major.minor version 51.0     @ org.apache.tools.ant.module.bridge.antbridge.loaddefs(antbridge.java:561)     @ org.apache.tools.ant.module.bridge.antbridge.createcustomdefs(antbridge.java:538)     @ org.apache.tools.ant.module.bridge.antbridge.createantinstance(antbridge.java:326)     @ org.apache.tools.ant.module.bridge.antbridge.getantinstance(antbridge.java:279)     @ org.apache.tools.ant.module.bridge.antbridge.getinterface(antbridge.java:268)     @ org.apache.tools.ant.module.run.targetexecutor.run(targetexecutor.java:541)     @ org.netbeans.core.execution.runclassthread.run(runclassthread.java:153) caused by: java.lang.unsupportedclassversionerror: org/netbeans/modules/javame/profiler/ant/openprofiler : unsupported major.minor version 51.0     @ java.lang.classloader.defineclass1(native method)     @ java.lang.classloader.defineclasscond(classloader.java:632)     @ java.lang.classloader.defineclass(classloader.java:616)     @ java.security.secureclassloader.defineclass(secureclassloader.java:141)     @ java.net.urlclassloader.defineclass(urlclassloader.java:283)     @ java.net.urlclassloader.access$000(urlclassloader.java:58)     @ java.net.urlclassloader$1.run(urlclassloader.java:197)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(urlclassloader.java:190)     @ org.apache.tools.ant.module.bridge.auxclassloader.findclass(auxclassloader.java:88)     @ java.lang.classloader.loadclass(classloader.java:307)     @ java.lang.classloader.loadclass(classloader.java:248)     @ org.apache.tools.ant.module.bridge.antbridge.loaddefs(antbridge.java:550)     ... 6 more caused by: loading: org.netbeans.modules.javame.profiler.ant.openprofiler

please dont know start

according this, "the classes compiled newer jvm try run with. use newer jdk."


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