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Java Key Bindings and Arrow Keys


Java Key Bindings and Arrow Keys

By : Aonym.
Date : November 16 2020, 06:23 AM
should help you out When you create anything as complicated as a game, you should use the model / view / controller pattern.
So, let's create a model class.
code :
public class GameModel {

    private int xCoordinate;
    private int yCoordinate;

    public int getxCoordinate() {
        return xCoordinate;
    }

    public void setxCoordinate(int xCoordinate) {
        this.xCoordinate = xCoordinate;
    }

    public int getyCoordinate() {
        return yCoordinate;
    }

    public void setyCoordinate(int yCoordinate) {
        this.yCoordinate = yCoordinate;
    }

}


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how can I detect arrow keys in java?

how can I detect arrow keys in java?


By : Margreet Hoekstra
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I know how to implement a key listener; that's not the problem. , I would recommend using:
code :
if (event.getKeyCode() == KeyEvent.VK_UP) {
...
}
Using Key Bindings with Arrow Keys

Using Key Bindings with Arrow Keys


By : user3560514
Date : March 29 2020, 07:55 AM
will help you I figured it out while trying to do an SSCCE. When I start a new game, I create a new Sprite object without the key bindings of the old one, so my key binding data is lost. I moved my code to add key bindings to the doNewGame() method and it works now.
Move a circle using arrow keys - Java

Move a circle using arrow keys - Java


By : GenG
Date : March 29 2020, 07:55 AM
will be helpful for those in need I'm experimenting with JavaFX right now teaching myself how to move text and items using the arrow keys. I made a program that simply moves text around the stage if an arrow key is pressed down.
code :
scene.setOnKeyPressed(e -> {
    switch (e.getCode()) {
    case DOWN:
        circle.setCenterY(circle.getCenterY() + 10);
        break;
    case UP:
        circle.setCenterY(circle.getCenterY() - 10);
        break;
    case LEFT:
        circle.setCenterX(circle.getCenterX() - 10);
        break;
    case RIGHT:
        circle.setCenterX(circle.getCenterX() + 10);
        break;
    }
});
Java Processing use arrow keys for aim

Java Processing use arrow keys for aim


By : Windows
Date : March 29 2020, 07:55 AM
will help you I'm using Java Processing 3 and making a two player tank game. Below is my code for a turret. Currently i have the turret's aim following the mouse in tDir, i wanted to be able to use the up and down arrows to move the aim upwards and downwards from 0 to 90 degrees. ,
aim upwards and downwards from 0 to 90 degrees
code :
x = cos(angle) * radius
y = sin(angle) * radius
tDir.x = cos(angle) * 50;
tDir.y = sin(angle) * 50;
PVector mPos; //mouse position
PVector tPos; //position of turret
PVector tDir; //the firing direction of the turret
 int gravMult = 3;
//angle in radians
float angle = 0;

void setup() {
  size(1200, 600);
  init();
}

void init() {
  //PVector initializations
  mPos = new PVector(); //zero til mouse x and y exist
  tPos = new PVector(width/8, height * .75);
  tDir = new PVector(); //
}
void draw() { 
  //clear last frame
  background(100,100,140);

  //check keys to see if there is new key input for turret
  if (keyPressed){
    if (key == 'w'){
      angle -= 0.1;
      tDir = PVector.mult(PVector.fromAngle(angle),50);
    }
    else if (key == 's'){
      angle += 0.1;
      tDir = PVector.mult(PVector.fromAngle(angle),50);
    }
  }else if(mousePressed){
    mPos.set(mouseX, mouseY);
    tDir = PVector.sub(mPos, tPos);
    tDir.normalize();
    tDir.mult(50);
  }
  //draw
  fill(255);  
  ellipse(tPos.x, tPos.y, 40, 40);
  strokeWeight(5);
  line(tPos.x, tPos.y, tPos.x + tDir.x, tPos.y + tDir.y);
  fill(255, 0, 0);
  ellipse(tPos.x + tDir.x, tPos.y + tDir.y, 10, 10);
}
Html - disable page scrolling with arrow keys with out toatlly disabling arrow keys

Html - disable page scrolling with arrow keys with out toatlly disabling arrow keys


By : Elad Noor
Date : March 29 2020, 07:55 AM
it helps some times You should be able to catch the keydown event and prevent the default action (e.g. scrolling), then do whatever else you want with the event. For example:
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