bugfix: use BytecodeFunc.class.getClassLoader() for FuncClassLoader

src/symjava/examples/ExampleMultiThread.java

@@ -0,0 +1,35 @@
+package symjava.examples;
+
+import static symjava.symbolic.Symbol.x;
+import static symjava.symbolic.Symbol.y;
+import symjava.bytecode.BytecodeFunc;
+import symjava.symbolic.Expr;
+import symjava.symbolic.utils.JIT;
+
+/**
+ * test class loader for multi thread case
+ * @author yueming.liu
+ *
+ */
+public class ExampleMultiThread {
+
+	public static void main(String[] args) throws InterruptedException {
+		Thread t = new Thread(new Runnable() {
+			@Override
+			public void run() {
+				Expr R = 0.127-(x*0.194/(y+0.194));
+				Expr Rdy = R.diff(y);
+				System.out.println(Rdy);
+
+				//Just-In-Time compile the symbolic expression to native code
+				BytecodeFunc func = JIT.compile(new Expr[]{x,y}, Rdy);
+				System.out.println(func.apply(0.362, 0.556)); //Scala function call operator
+				System.out.println(func.call(0.362, 0.556)); //Groovy function call operator
+
+			}
+		});
+		t.start();
+		t.join();
+	}
+
+}

src/symjava/symbolic/utils/FuncClassLoader.java

@@ -1,11 +1,16 @@
 package symjava.symbolic.utils;
 
+import symjava.bytecode.BytecodeFunc;
+
 import com.sun.org.apache.bcel.internal.generic.ClassGen;
 
 public class FuncClassLoader<T> extends ClassLoader {
 
 	public FuncClassLoader() {
-		super(Thread.currentThread().getContextClassLoader());
+		//super(Thread.currentThread().getContextClassLoader());
+		//https://blogs.oracle.com/sundararajan/understanding-java-class-loading
+		//super(java.lang.ClassLoader.getSystemClassLoader());
+		super(BytecodeFunc.class.getClassLoader());
 	}
 //	
 //	public FuncClassLoader(ClassLoader parent) {