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kucky

T got found this example....

int io=0;
int counter=0;
PFont myFont;
String[] test;
String[] test2;

void setup(){
  size(512, 512);
  smooth();
  background(0);
  myFont = createFont("xkcd", 64);
  textFont(myFont);
  textAlign(CENTER);
  io = 0;
  counter=0;
}

void draw(){
  background(0);
  text(counter, height/2, width/2);

  text("Test2 "+test2[0], 50, 50);             /// NullPointerException
  println(test2[1]);                                   

  counter++;
}   

void keyPressed() {
  if (key == '1') {
    openData();
  }
}

void openData() {
  println("open data...");
  // stop the draw() function
  noLoop();
  selectInput("Select a file...", "myFile");

  println("...function end.");
}

void Textsichern (String[] _val) {               /// My modifying.
  test2 = _val;  
  text("Test2 "+test2[0], 50, 50);
  println(test2[1]);
}

void myFile(File selection) {
  io=1;
  if (selection == null) {
    println("No file selected.");
  } else  {
    println("File selected: " + selection.getAbsolutePath());
    counter=0;
    Textsichern(loadStrings(selection.getAbsolutePath()));   /// My modifying.
  }
  // restart the draw() function
  loop();
  io=0;
}

...and modifying them. Error at line 22

Gruß Willi

TfGuy44

Nothing is assigned to test2[0] in the first iteration of draw(), which is why you get a null pointer exception. You migh try assigning it an empty string in setup():

test2[0] = "";

Chrisir

    int io=0;
    int counter=0;
    PFont myFont;
    //String[] test;
    String[] test2=new String[3];

    void setup() {
      size(512, 512);
      smooth();
      background(0);
      myFont = createFont("xkcd", 22);
      textFont(myFont);
      textAlign(CENTER);
      io = 0;
      counter=0;
    }

    void draw() {
      background(0);
      text(counter, height/2, width/2);

      text("Test2 "+test2[0], 50, 50);             /// NullPointerException
      println(test2[1]);                                   

      counter++;
    }   

    void keyPressed() {
      if (key == '1') {
        openData();
      }
    }

    void openData() {
      println("open data...");
      // stop the draw() function
      noLoop();
      selectInput("Select a file...", "myFile");

      println("...function end.");
    }

    void Textsichern (String[] _val) {               /// My modifying.
      test2 = _val;  
      // text("Test2 "+test2[0], 50, 50);
      //println(test2[1]);
    }

    void myFile(File selection) {
      io=1;
      if (selection == null) {
        println("No file selected.");
      } else {
        println("File selected: " + selection.getAbsolutePath());
        counter=0;
        Textsichern(loadStrings(selection.getAbsolutePath()));   /// My modifying.
      }
      // restart the draw() function
      loop();
      io=0;
    }

kucky

Hey, thanks for the quick response. It´s so simple, but i didn't see it. I got try it with "try - catch".

void displayTest(){
    try{    
      for(int i = 0; i < test.length; i++){
        text(test[i], 50, 50+(i*40));
      }
    }
    catch (Exception e) {
      println("Exception");
    }
}

The code is running, but with exceptions. Yours is much better.

Happy Easter.

Chrisir

Happy Easter!

Chrisir

if(text...!=null) {.....

Chrisir

Or you have a state/ stage system and wait until the loading succeeded