Hi

I am getting the error - For input string: "" for the below program. Does anyone have idea why I might be getting this error? Any help appreciated.

Thanks

import interfascia.*;

IFButton go,fact,restart;
GUIController g,t,r;
PFont font;
IFTextField textfield;
int f1=0,num,ans;
String a;

void setup()
{
  size(1350,700);
  g = new GUIController(this);
  t = new GUIController(this);
  go = new IFButton ("GO!", 600, 400, 100, 20);
  fact = new IFButton ("Factorial", 620, 400);
  go.addActionListener(this);
  fact.addActionListener(this);
  textfield=new IFTextField("",620,350);
  t.add(fact);
  t.add(textfield);
 
  //goLook = new IFLookAndFeel(this, IFLookAndFeel.DEFAULT);
  //goLook.baseColor = color(180);
  //goLook.highlightColor = color (80);
  //c.setLookAndFeel(goLook);
  //c.setHeight(50);
  g.add (go);
  r = new GUIController (this);
  restart = new IFButton ("Restart", 1170, 620, 100, 20);
  restart.addActionListener(this);
  r.add(restart);
  font=loadFont("ArialRoundedMTBold-60.vlw");
  textFont(font);
  t.setVisible(false);
  r.setVisible(false);
}

void draw()
{
  smooth();
  if(f1==0)
  {
    fill(0);
    //choice.setVisible(false);
    background(70,150,20);
    textSize(60);
    text("Let's learn about recursion",260,300);
    textSize(40);
    text("In Computer Science",480,350);
    //c.setVisible(false);
    //for(int i=3;i<93;i++)
  }
  if(f1==1)
  {
    background(70,150,20);
    stroke(0);
    strokeWeight(4);
    textSize(50);
    text("Enter a number from 1 to 4 to find its factorial",150,300);
  }
  if(f1==2)
  {
    if(num==1)
    {
      background(255);
      textSize(40);
      text("Factorial of 1 = 1",200,350);
    }
  }
   
}

void actionPerformed (GUIEvent e)
{
  if(e.getSource()==go)
  {
    //frameRate(5);
    f1=1;
    g.setVisible(false);
    t.setVisible(true);
    //c.setVisible(true);
    r.setVisible(true);
   
    draw();
  }
  if(e.getSource()==fact)
  {
    f1=2;
    a=textfield.getValue();
    //println(str);
    num=Integer.parseInt(a);
    t.setVisible(false);
    draw();
    //println(a);
  }
  /*if(e.getSource()==restart)
  {
    f1=0;
    num=0;
    ans=0;
    t.setVisible(false);
    r.setVisible(false);
    g.setVisible(true);
    textfield.setValue("");
    draw();
  }*/
}

Hi

I want to make a project with processing that can identify what the user says through a microphone. For example if the user says "yes", then perform a set of actions and if the user says "no" then perform another set of actions. Is there any library that would let me achieve this? Any help will be appreciated.

Thanks