package javascript;

import javax.script.ScriptEngineFactory;

import javax.script.ScriptEngineManager;

public class JavaScript {

public static void main(String[] args) {

ScriptEngineManager m = new ScriptEngineManager();

for (ScriptEngineFactory factory : m.getEngineFactories()) {

System.out.println(factory.getEngineName());

System.out.println(factory.getLanguageName());

System.out.println("--------------------");

}

}

}

package javascript;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;

public class JavaScript {

public static void main(String[] args) {

try {

ScriptEngineManager m = new ScriptEngineManager();

ScriptEngine e = m.getEngineByName("nashorn");

e.eval("print('Hello World!')");

} catch (ScriptException ex) {

Logger.getLogger(JavaScript.class.getName()).log(Level.SEVERE, null, ex);

}

}

}

package javascript;

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

public class JavaScript2 {

public static void main(String[] args) throws Throwable {

ScriptEngineManager e = new ScriptEngineManager();

ScriptEngine nashorn = e.getEngineByName("nashorn");

nashorn.eval("function sum(a, b) { return a+b; }");

Invocable invocable = (Invocable) nashorn;

Integer result = (Integer)invocable.invokeFunction("sum", 20, 23);

System.out.println(result);

}

}

package javascript;

import javax.script.*;

public class JSInterfaces {

public static void main(String[] args) throws Exception {

ScriptEngineManager e = new ScriptEngineManager();

ScriptEngine nashorn = e.getEngineByName("nashorn");

String script = "function run() {print('This is running in a thread!'); }";

nashorn.eval(script);

Invocable invocable = (Invocable) nashorn;

Runnable runnable = invocable.getInterface(Runnable.class);

Thread thread = new Thread(runnable);

thread.start();

}

}

function sum(a, b) {

return a + b;

}

function multiply(a, b) {

return a * b;

}

function max(a, b) {

return Math.max(a, b);

}

print(sum(100, 15));

package javascript;

import java.util.Arrays;

import java.util.List;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

public class JavaScript {

public static void main(String[] args) {

try {

ScriptEngineManager m = new ScriptEngineManager();

ScriptEngine e = m.getEngineByName("nashorn");

e.eval(new java.io.FileReader("src/javascript/helpers.js"));

Invocable invocable = (Invocable) e;

Integer result = (Integer)invocable.invokeFunction("sum", 20, 30);

System.out.println(result);

} catch (Exception ex) {

Logger.getLogger(JavaScript.class.getName()).log(Level.SEVERE, null, ex);

}

}

}

function useJava() {

var list = new java.util.ArrayList();

list.add(8);

list.add(20);

list.add(88);

list.add(21);

return list.stream().mapToInt(function(i) {return i*i}).sum();

}

[1,2,3,4,5,6,7,8].filter(function(i) {return i%2==1})

list = new java.util.ArrayList();

list.add(1);

list.add(2);

list.add(3);

result = list.stream().mapToInt(function(i) {return i*i}).sum()

print(result)