Processing errorsmessages

I want to create a Javacode in processing with a simple square who can be moved by pressing A,W,S and D so i wrote a code to do so but I keep getting errormessages. I was wondering if i could get help to fix the errors.

public void setup() {
  

  k = new karaktar();


  background (#F5CD0C);
  size( 800, 800 );
  strokeWeight( 20 );
  frameRate( 24 );


}

int lastKey = 0;
int lastKey2 =0; 
void keyPressed() {
  if (lastKey != key) {
    lastKey = key; 
    k.move();

  }
}



boolean start = false;
//draw
void draw() { 
      start = true;
 
}

class karaktar {

  float x = 400;
  float y = 500;
  
  boolean alreadypressed = false;
  
  float xF = x;
  float yF = y-100;
  float xFF = 0;
  float yFF = 0;



  int h1 = 50;
  int w1 = 50;
  int hF = h1;
  int wF = w1;
  float wFF = 0;
  float hFF = 0;




  }

 

  void move() {

    if (keyPressed) {
       if (key == 'w' || key == 'W') {
       
        y -= 50;
        yF -=50;
      }
    }
    if (keyPressed) {
      if (key == 'a' || key == 'A') {
       
        x -= 50;
        xF -= 50;
      }
    }
    if (keyPressed) {
      if (key == 's' || key == 'S') {
      
        y += 50;
        yF += 50;
      }
    }
    if (keyPressed) {
      if (key == 'd' || key == 'D') {
     
        x += 50;
        xF +=50;
      }
    }
  
}

The first code is meant to be the playingfield and the second is for the moving square.

Seems like your variable k in method setup() is not declared.

Use karaktar k = new karaktar();, or use

karaktar k;

someMethod() {
    k = new karaktar();
}

// note:

also, it's a convention to name classes with uppercase first letter. I'd suggest renaming class karaktar to class Karaktar.

Looking at what you've posted, you're likely referencing something somewhere that doesn't exist:

• k = new karaktar(); only works if the variable k is declared somewhere with a line like karaktar k;.
• background(#F5CD0C); the method background must exist, and it looks like you are trying to pass in a hexadecimal number. In Java, hex numbers are identified by 0x, not #. I imagine that line should be background(0xF5CD0C);
• size(800, 800); The method size also has to exist.
• strokeWeight(20); ditto, must exist somewhere.
• frameRate(24); ditto
• if (lastKey != key) { variable key must be declared somewhere, presumably an int to compare to lastKey.
• k.move(); again, k must be declared somewhere.

In your class karaktar, variables keyPressed and key were not declared, and you had unbalanced curly braces. Below I have fixed the curly braces, but not the variable declarations (in case you aren't showing the code where they are defined):

class karaktar {
  float x = 400;
  float y = 500;

  boolean alreadypressed = false;

  float xF = x;
  float yF = y-100;
  float xFF = 0;
  float yFF = 0;

  int h1 = 50;
  int w1 = 50;
  int hF = h1;
  int wF = w1;
  float wFF = 0;
  float hFF = 0;

  void move() {
    if (keyPressed) {
       if (key == 'w' || key == 'W') {

        y -= 50;
        yF -=50;
      }
    }

    if (keyPressed) {
      if (key == 'a' || key == 'A') {

        x -= 50;
        xF -= 50;
      }
    }

    if (keyPressed) {
      if (key == 's' || key == 'S') {

        y += 50;
        yF += 50;
      }
    }

    if (keyPressed) {
      if (key == 'd' || key == 'D') {

        x += 50;
        xF +=50;
      }
    }
  }
}