Using my own types on a Script Engine....

Hi ppls how are you doing?
Im trying to expose some of my own types using the 'put' method from the java Script Engine but its guive-me a error. See my code:
package com.xcreator; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; import javax.script.ScriptException; public class Script { public static void main(String[] args) { Actor ac = new Actor(); ac.setX(100); ac.setY(200); ScriptEngineManager engineMgr = new ScriptEngineManager(); ScriptEngine engine = engineMgr.getEngineByName("JavaScript"); engine.put("instance", ac); try { engine.eval("importPackage(com.xcreator);" + "print(instance.getY());" ); } catch (ScriptException ex) { System.out.println(ex.getMessage()); } } }
See, the Actor class is a custom class of mine so when I try to use getY() method java return an error tell me that the method does not exists. Whats wrong ? Can I use my own object or only the java native ones?
Thanks in advance!

I tried your code. I had to make up my own class Actor because you didn't post yours. It worked without any errors and printed 200.

Does your class Actor have a public method called getY?

Here's my Actor class, very simple:
class Actor { private int x; private int y; public int getX() { return x; } public void setX(int x) { this.x = x; } public int getY() { return y; } public void setY(int y) { this.y = y; } }

Its weird because my Actor class is on the same package com.xcretor and the method getX() is coderanch. Im getting this error:
"sun.org.mozilla.javascript.internal.EcmaError: TypeError: Cannot find function getY in object com.xcreator.Actor@53187f60. (<Unknown source>#1) in <Unknown source> at line number 1"
Its really weird....
Here is my actor class:
package com.xcreator; import java.awt.Color; import java.awt.Graphics; public class Actor { private float x; float y; float hspeed; float vspeed; float friction; int width; int height; Color color; public Actor() { x = 0; y = 0; hspeed = 0; vspeed = 0; friction = 0; width = 32; height = 32; color = Color.white; } float getX() { return x;} float getY() { return y;} float getHSpeed() { return hspeed;} float getVSpeed() { return vspeed;} float getFriction() { return friction;} float getWidth() { return width;} float getheight() { return height; } void setX(float x) { this.x = x;} void setY(float y) { this.y = y;} void setHSpeed(float hspeed) { this.hspeed = hspeed;} void setVSpeed(float vspeed) { this.vspeed = vspeed;} void setWidth(int width) {this.width = width;} void setHeight(int height) {this.height = height;} void update() { float sg; if (hspeed != 0) { sg = Math.signum(hspeed); x = x + hspeed; hspeed = Math.abs(hspeed) - friction; if (hspeed < 0) hspeed = 0; else hspeed = hspeed * sg; } if (vspeed != 0) { sg = Math.signum(vspeed); x = x + vspeed; vspeed = Math.abs(vspeed) - friction; if (vspeed < 0) vspeed = 0; else vspeed = vspeed * sg; } } public void draw(Graphics g) { g.setColor(color); g.drawRect((int) x, (int) y, width, height); } }

Vinicius Souza wrote:Its weird because my Actor class is on the same package com.xcretor and the method getX() is coderanch.

Yes, but this is about the getY method, not the getX method.

And looking at your code, the getX and getY methods are not coderanch, they have default access.

You're writing in a kind of C++-style. Specifying access specifiers in Java does not work the same as in C++. Look at this:

public class Actor { private float x; float y; float hspeed; float vspeed; float friction;
Do you understand what's happening here? Only the variable x has private access. All the other variables have default access. The indentation you've used is misleading - as if all the variables are private. This is the same as:
public class Actor { private float x; float y; float hspeed; float vspeed; float friction;

You are doing the same with the constructor and methods:
public Actor() { x = 0; y = 0; hspeed = 0; vspeed = 0; friction = 0; width = 32; height = 32; color = Color.white; } float getX() { return x;} float getY() { return y;} float getHSpeed() { return hspeed;} float getVSpeed() { return vspeed;} float getFriction() { return friction;} float getWidth() { return width;} float getheight() { return height; }
The constructor is coderanch, but all the methods have default access.

You have to specify private or public for all variables and methods separately.

Hummm, thanks a lot friend. Solved my problem! I really was thinking like a C programmer ehehehehe.