What is the best way to call a JavaScript function in a different .js file from a Java file?
Say, I have a String like so in a Java file:
String test = "[name1, name2, name2]";
What I am trying to do is the following:
- Convert the Java String into a JavaScript array
- Pass the JavaScript array to a JavaScript function in a different .js file.
Thanks, Sony
What is the best way to call a JavaScript function in a different .js file from a Java file?
Say, I have a String like so in a Java file:
String test = "[name1, name2, name2]";
What I am trying to do is the following:
- Convert the Java String into a JavaScript array
- Pass the JavaScript array to a JavaScript function in a different .js file.
Thanks, Sony
Share Improve this question asked Mar 4, 2012 at 0:05 sonysony 1,58710 gold badges37 silver badges51 bronze badges 3- 1 JS runs on the client side, Java runs on the server's side. The server-side does not "pass" parameters to the client-side, the server-side generates the client-side. So I don't understand the issue. Can you tell us more about what you're trying to do ? – Nir Alfasi Commented Mar 4, 2012 at 0:17
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@alfasin
Java runs on the server's sideJava also could be a java applet java.sun./products/plugin/1.3/docs/jsobject.html – Cheery Commented Mar 4, 2012 at 2:42 - 1 @Cheery you're right. But I have a feeling that Sony didn't refer to applets. – Nir Alfasi Commented Mar 4, 2012 at 4:25
2 Answers
Reset to default 6If you want to use JavaScript in a Java application, you can use Rhino.
If you want to call client side JavaScript form a serverside Java web application, you can use DWR's Reverse Ajax.
Good luck!
If you want to integrate Javascript and Java, then you can use Rhino. See the example below for a better prehension:
test.js
function test(array){
for(var i in array){
out.println(array[i]);
}
}
RhinoTest.java
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextFactory;
import org.mozilla.javascript.Scriptable;
public class RhinoTest {
public static void main(String[] args) {
Context ctx = new ContextFactory().enterContext();
Scriptable scope = ctx.initStandardObjects();
try {
Object out = Context.javaToJS(System.out, scope);
scope.put("out", scope, out);
FileReader fr = new FileReader("test.js");
ctx.evaluateReader(scope, fr, "<cmd>", 1, null);
fr.close();
String[] strArray = {"name1","name2","name3"};
Object jsArray = Context.javaToJS(strArray, scope);
scope.put("jsArray", scope, jsArray);
ctx.evaluateString(scope, "test(jsArray)", "<cmd>", 1, null);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Context.exit();
}
}