import javax.script.ScriptContext; 
import javax.script.ScriptEngine; 
import javax.script.ScriptEngineManager;
import javax.script.ScriptException; 

public class GlobalvariableTest {
	public static void main(String[] args) { 
		ScriptEngineManager manager = new ScriptEngineManager(); 

		ScriptEngine engine1 = manager.getEngineByName("nashorn"); 
		try {
			engine1.eval("var sum = 0;");
		} catch (ScriptException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 

		// set global variable 
		manager.setBindings(engine1.getBindings(ScriptContext.ENGINE_SCOPE)); 

		ScriptEngine engine2 = manager.getEngineByName("nashorn"); 
		try {
			engine2.eval("sum = 150;", engine2.createBindings());
			engine2.eval("print(sum);", engine2.createBindings()); 
		} catch (ScriptException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		
	} 

}