HelloWorld: define "cout" as a field

src/test/java/testjoltjni/app/helloworld/HelloWorld.java

@@ -22,6 +22,7 @@ of this software and associated documentation files (the "Software"), to deal
 package testjoltjni.app.helloworld;
 import com.github.stephengold.joltjni.*;
 import com.github.stephengold.joltjni.enumerate.*;
+import java.io.PrintStream;
 import testjoltjni.TestUtils;
 
 /**
@@ -33,6 +34,7 @@ of this software and associated documentation files (the "Software"), to deal
  */
 public class HelloWorld {
 
+    static PrintStream cout=System.out;
 
 
 
@@ -103,25 +105,25 @@ static class MyContactListener extends CustomContactListener
 	// See: ContactListener
 	int onContactValidate(long body1Va, long body2Va, double offsetX, double offsetY, double offsetZ, long inCollisionResult)
 	{
-		System.out.println("Contact validate callback");
+		cout .println( "Contact validate callback" ) ;
 
 		// Allows you to ignore a contact before it is created (using layers to not make objects collide is cheaper!)
 		return ValidateResult.AcceptAllContactsForThisBodyPair.ordinal();
 	}
 
 	public void			onContactAdded(long body1Va, long body2Va, long manifoldVa, long settingsVa)
 	{
-		System.out.println("A contact was added");
+		cout .println( "A contact was added" ) ;
 	}
 
 	public void			onContactPersisted(long body1Va, long body2Va, long manifoldVa, long settingsVa)
 	{
-		System.out.println("A contact was persisted");
+		cout .println( "A contact was persisted" ) ;
 	}
 
 	public void			onContactRemoved(long pairVa)
 	{
-		System.out.println("A contact was removed");
+		cout .println( "A contact was removed" ) ;
 	}
 };
 
@@ -131,12 +133,12 @@ static class MyBodyActivationListener extends CustomBodyActivationListener
 public
 	 void		onBodyActivated(long idVa, long inBodyUserData)
 	{
-		System.out.println("A body got activated");
+		cout .println( "A body got activated" ) ;
 	}
 
 	public void		onBodyDeactivated(long idVa, long inBodyUserData)
 	{
-		System.out.println("A body went to sleep");
+		cout .println( "A body went to sleep" ) ;
 	}
 };
 
@@ -272,7 +274,7 @@ public static void main(String[] argv)
 		// Output current position and velocity of the sphere
 		RVec3 position = body_interface.getCenterOfMassPosition(sphere_id);
 		Vec3 velocity = body_interface.getLinearVelocity(sphere_id);
-		System.out.println("Step " + step + ": Position = " + position + ", Velocity = " + velocity);
+		cout .println( "Step " + step + ": Position = " + position + ", Velocity = " + velocity ) ;
 
 		// If you take larger steps than 1 / 60th of a second you need to do multiple collision steps in order to keep the simulation stable. Do 1 collision step per 1 / 60th of a second (round up).
 		final int cCollisionSteps = 1;