Beginner Java Modding Problem...

[walkineagle]

Hello im trying to use Keyboard.isKeyDown to create a way to make it so if the button is pressed something will happen and if I press the button again it will stop. I have the basic concept worked out, and I HAD it working with another thing but for some reason this code won't work (im making mods for a Java game using Java Eclipse EE):

		if(Keyboard.isKeyDown(36) && buttonpress==false){
			buttonpress=true;
			whattodo=!whattodo;
		}
		if(!Keyboard.isKeyDown(36)){
			buttonpress=false;
		}
		if(whattodo=false){
			moty=0.41999998688697815D;
		}
		if(whattodo=true){
			moty=0.71999998688697815D;
		}

whattodo and buttonpress are booleans and moty is a double. moty is the variable for MotionY. Later on in this code I use this (or something like it, its not the exact code) to call it

Public class Jump(){
MotionY = moty;
}

Im trying to make it so when I press "J" or J = true MotionY is .3 higher (A very noticable difference)

[Fubarable]

Use a Swing Timer. I would also use key binding rather than a key listener to check for key press.

Also, this is messed up:

		if(whattodo=false){
			moty=0.41999998688697815D; // ??? what's the D for ???
		}
		if(whattodo=true){
			moty=0.71999998688697815D;
		}

You are not checking for equality which uses ==, but you don't even want to. To check if a boolean is true you simply do

		if (!whattodo) {
			moty=0.41999998688697815;
		} else {
			moty=0.71999998688697815;
		}

[walkineagle]

Okay so I tried this and it doesn't work... MotionY always stays at the .4 one.

    protected void jump()
    {
		if(Keyboard.isKeyDown(36) && !buttonpress){
			buttonpress=true;
			whattodo=!whattodo;
		}
		if(!Keyboard.isKeyDown(36)){
			buttonpress = false;
		}
		if (!whattodo) {
			moty=0.41999998688697815D;
		} else {
			moty=0.71999998688697815D;
		}
        motionY = moty;
    }

[walkineagle]

Solved thank you :)