Java Errors

from this int a ; if ( i != 0 && k == 7 ){ a = 10 ; } else a = 3 ; } to this nice one int a = ( i != 0 && k == 7 ) ? 10 : 3 ;

An error has occurred. See error log for more details. org.eclipse.jst.javaee.applicationclient.internal.impl.ApplicationClientImpl cannot be cast to org.eclipse.jst.javaee.web.WebApp

Error Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/core/OrderComparator$OrderSourceProvider at springuate.main.main(main.java:22) Caused by: java.lang.ClassNotFoundException: org.springframework.core.OrderComparator$OrderSourceProvider at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 1 more D:\....\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1 BUILD FAILED (total time: 0 seconds)  Solution You need just to add the latest JAR spring-core-4.3.3.RELEASE spring-beans-4.3.3.RELEASE commons-logging-1.2

In Java 8 , one of the features was the default methods public interface myInterface { default int divByten ( int . . . numbers ) { return sum ( number) /10 ; } } In Java 9 we can simply have a private interface method:  public interface myInterface { private int divByten ( int . . . numbers ) { return sum ( numbers) /10 ; } }