Processing入門 Java編3: レスポンス

新・Java入門編6: 変数を学習しよう
https://paiza.jp/works/java/new-primer/java-new-primer-6

新・Java入門編5: 演算子を学習しよう
https://paiza.jp/works/java/new-primer/java-new-primer-5

新・Java入門編21: 参照型とプリミティブ型について学習しよう
https://paiza.jp/works/java/new-primer/java-new-primer-21

新・Java入門編12: 条件分岐を理解しよう
https://paiza.jp/works/java/new-primer/java-new-primer-12

新・Java入門編22: クラスについて学習しよう - メソッドとは
https://paiza.jp/works/java/new-primer/java-new-primer-22/89102

draw()
https://processing.org/reference/draw_.html

setup()
https://processing.org/reference/setup_.html

colorMode()
https://processing.org/reference/colorMode_.html

size()
https://processing.org/reference/size_.html

keyPressed
https://processing.org/reference/keyPressed.html

key
https://processing.org/reference/key.html

keyCode
https://processing.org/reference/keyCode.html

void setup() {
  size(720, 480);
  colorMode(HSB, 360, 100, 100);
}

void draw() {
  background(0, 0, 79);
}

void setup() {
  size(720, 480);
  colorMode(HSB, 360, 100, 100);
}

int w = 50;
void draw() {
  background(0, 0, 79);
  if (keyPressed) {
    if (key == 'c' || key == 'C') {
      circle(360, 240, w);
    } else if (key == CODED) {
      if (keyCode == UP) {;
        w++;
      }
    }
  }
}