java - How to shoot bullets when space bar is pressed using LibGDX? -

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i did follows:

... if (gdx.input.iskeypressed(keys.space)) {    shoot(); } ...

the problem if keep pressing space many bullets created. want bullet shot when press space not while i'm pressing key.

took @ documentation library, , doesn't seem expose other way of getting key presses (particularly key down/release). in such case can keep track of keep changes spacealreadypressed variable persists between frames. 

... boolean spaceispressed = gdx.input.iskeypressed(keys.space); if (spaceispressed && !spacealreadypressed) {    shoot(); } ... spacealreadypressed = spaceispressed;

it may safer use spaceispressed variable in case input state changes unexpectedly.

alternatively, if want make shorter, can use logical laws reduce following, canshoot persists between frames , has initial value of false. 

... canshoot = !canshoot && gdx.input.iskeypressed(keys.space); if (canshoot) {    shoot(); } ...

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