Save the compiled JavaScript to CompiledScript object : Script Engines « JDK 6 « Java

1. Java
2. JDK 6
3. Script Engines

Save the compiled JavaScript to CompiledScript object

     

import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class CompileTest {
  public static void main(String args[]) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("javascript");
    engine.put("counter", 0);
    if (engine instanceof Compilable) {
      Compilable compEngine = (Compilable) engine;
      try {
        CompiledScript script = compEngine.compile("function count(){counter=counter+1;return counter;}; count();");
        System.out.println(script.eval());
        System.out.println(script.eval());
        System.out.println(script.eval());
      } catch (ScriptException e) {
        System.err.println(e);
      }
    } else {
      System.err.println("Engine can't compile code");
    }
  }
}

          
    
    
    
  

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