我刚刚开始在NetBEansIDE 7.3.1中编写Scala编程，当我创建了我的hello world应用程序时出现此错误 我跟着这个tuto：https://www.youtube.com/watch?v=RbS1A6_jpH4
java.lang.UnsupportedClassVersionError: scala/tools/ant/ClassloadVerify : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1299)
at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1355)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1315)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.tools.ant.taskdefs.Definer.addDefinition(Definer.java:594)
at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:239)
at org.apache.tools.ant.taskdefs.Antlib.execute(Antlib.java:176)
at org.apache.tools.ant.taskdefs.Definer.loadAntlib(Definer.java:443)
at org.apache.tools.ant.taskdefs.Definer.execute(Definer.java:292)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.GeneratedMethodAccessor85.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:392)
at org.apache.tools.ant.Target.performTasks(Target.java:413)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:283)
at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:541)
at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)