String.isEmpty() is missing.

[coderextreme]

java -cp "../j2js-compiler/libs/commons-io-1.4.jar;../j2js-compiler/libs/bcel-5.1.jar;../j2js-compiler/target/classes/" com.j2js.J2JSCompiler . "target/classes;../j2js-jre/target/classes/;../j2js-agent/target/classes/" net.x3djsonld.abox target/assemblies [INFO] Entry point is net.x3djsonld.abox#main(java.lang.String[])void [INFO] Creating assembly .\target\assemblies [INFO] Resolving class path [.\target\classes, ...\j2js-jre\target\classes, ...\j2js-agent\target\classes] [INFO] Cross-Compiling java.lang.RuntimeException [INFO] Cross-Compiling java.lang.Throwable [INFO] Cross-Compiling java.lang.Object [INFO] Cross-Compiling com.j2js.prodmode.ContextImpl [INFO] Cross-Compiling j2js.Context [INFO] Cross-Compiling javax.script.ScriptEngine [INFO] Cross-Compiling java.lang.System [INFO] Cross-Compiling java.lang.String [INFO] Cross-Compiling java.lang.CharSequence [INFO] Cross-Compiling java.lang.StringBuilder [INFO] Cross-Compiling java.lang.Class [INFO] Cross-Compiling java.util.HashMap [INFO] Cross-Compiling java.util.Map [INFO] Cross-Compiling javascript.JSObject [INFO] Cross-Compiling java.lang.ClassNotFoundException [INFO] Cross-Compiling java.lang.Exception [INFO] Cross-Compiling java.io.OutputStreamWriter [INFO] Cross-Compiling java.io.Writer [INFO] Cross-Compiling java.io.PrintWriter [INFO] Cross-Compiling java.util.ArrayList [INFO] Cross-Compiling java.util.AbstractCollection [INFO] Cross-Compiling java.lang.Iterable [INFO] Cross-Compiling java.util.Collection [INFO] Cross-Compiling java.util.List [INFO] Cross-Compiling j2js.client.Engine [INFO] Cross-Compiling j2js.client.GenericEventListener [INFO] Cross-Compiling java.util.Iterator [INFO] Cross-Compiling java.lang.Integer [INFO] Cross-Compiling java.lang.Number [INFO] Cross-Compiling javascript.ScriptHelper [INFO] Cross-Compiling net.x3djsonld.abox [INFO] Cross-Compiling org.web3d.x3d.jsail.Core.X3DObject [INFO] Cross-Compiling org.web3d.x3d.jsail.X3DConcreteStatement [INFO] Cross-Compiling org.web3d.x3d.jsail.X3DConcreteElement [INFO] Cross-Compiling java.io.PrintStream [INFO] Cross-Compiling java.io.OutputStream Exception in thread "main" java.lang.RuntimeException: No such method: java.lang.String#isEmpty()boolean at com.j2js.Assembly.processSingle(Assembly.java:238) at com.j2js.Assembly.processTainted(Assembly.java:220) at com.j2js.J2JSCompiler.execute(J2JSCompiler.java:172) at com.j2js.J2JSCompiler.execute(J2JSCompiler.java:115) at com.j2js.J2JSCompiler.main(J2JSCompiler.java:97)