Lucee Java Compilation Example

.gitignore

/*.class

Application.cfc

component {
  	this.javaSettings = {LoadPaths = ["./"], loadCFMLClassPath = true, reloadOnChange= true, watchInterval = 2, watchExtensions = "jar,class,xml"}

 	function onRequestStart(){ 		
 		compileClasses(); 		
 	}

	  /**
	 * compiles all .java files in /WEB-INF/lucee/classes via the ECJ BatchCompiler
	 * lucee code added to classpath via the jars in System classpath and the latest rc patch
	 */
	function CompileClasses() {
	 
	    var java = {	 
	          System        : createObject( 'java', 'java.lang.System' )
	        , PrintWriter   : createObject( 'java', 'java.io.PrintWriter' )
	        , StringWriter  : createObject( 'java', 'java.io.StringWriter' )
	        , BatchCompiler : createObject( 'java', 'org.eclipse.jdt.core.compiler.batch.BatchCompiler', 'ecj-4.2.2.jar' )
	    };
	 
	    var src = expandPath( '' );
	        
	    var rc  = arrayLast( directoryList( expandPath( '{lucee-server}/../patches' ) ) );
	    var cp = java.System.getProperty( "java.class.path" );      // all libs from System classpath        
	    cp &= Server.separator.path & rc;                           // add the lucee-Core to classpath
	 	// writeDump(cp);
	 	// abort;
	 
	    var out = java.StringWriter.init();     
	    var outWriter = java.PrintWriter.init( out, true );
	 
	    var cmd = "-cp #cp# #src#";
	 
	    outWriter.println( "Compiler Command: " & cmd );
	 
	    java.BatchCompiler.compile( cmd, outWriter, outWriter, javaCast( 'null', '' ) );
	    
	    outWriter.println( "Done." );
	    
	    var result = out.getBuffer().toString().trim();
	    writeDump(result);
	    return result;
	}
}

basic.java

public interface basic 
{ 
    public String sayHello(); 
} 

basicComponent.cfc

component {
  function sayHello(){
    return "Hello this is a basic component";
  }
}

Bicycle.java

public class Bicycle {
        
    // the Bicycle class has
    // three fields
    public int cadence;
    public int gear;
    public int speed;
        
    // the Bicycle class has
    // one constructor
    public Bicycle(int startCadence, int startSpeed, int startGear) {        
        gear = startGear;
        cadence = startCadence;
        speed = startSpeed;
    }
        
    // the Bicycle class has
    // four methods
    public void setCadence(int newValue) {
        cadence = newValue;
    }
        
    public void setGear(int newValue) {
        gear = newValue;
    }
        
    public void applyBrake(int decrement) {
        speed -= decrement;
    }
        
    public void speedUp(int increment) {
        speed += increment;
    }
        
}

ecj-4.2.2.jar

index.cfm