間歇性混吃等死，持續性躊躇滿志系列-------------第16天

1、桌球游戲小項目

①窗口加載

1 import javax.swing.*; 2 3 public class BallGame extends JFrame { 4 5 //窗口加載 6 void launchFrame() { 7 setSize(300, 300); 8 setLocation(100, 100); 9 setVisible(true); 10 } 11 12 public static void main(String[] args) { 13 System.out.println("游戲體驗"); 14 BallGame game = new BallGame(); 15 game.launchFrame(); 16 } 17 } 窗口加載

運行結果圖

②小球左右移動

注：圖片加載不出可嘗試用絕對路徑

1 import javax.swing.*; 2 import java.awt.*; 3 4 public class BallGame extends JFrame { 5 6 Image ball = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/ball.png"); 7 Image desk = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/desk.jpg"); 8 //小球的橫坐標 9 double x = 100; 10 //小球的縱坐標 11 double y = 100; 12 //方向 13 boolean right = true; 14 15 //畫窗口的方法 16 public void paint(Graphics g) { 17 System.out.println("窗體被畫了一次！"); 18 g.drawImage(desk, 0, 0, null); 19 g.drawImage(ball, (int) x, (int) y, null); 20 21 if (right) { 22 x += 10; 23 } else { 24 x -= 10; 25 } 26 //856是窗口寬度，40是桌子邊框的寬度，30是小球的直徑 27 if (x > 856-40-30) { 28 right = false; 29 } 30 //40是桌子邊框的寬度 31 if (x < 40) { 32 right = true; 33 } 34 } 35 36 //窗口加載 37 void launchFrame() { 38 setSize(856, 500); 39 setLocation(50, 50); 40 setVisible(true); 41 42 //重畫窗口,每秒畫25次 43 while (true) { 44 repaint(); 45 try { 46 Thread.sleep(40); 47 } catch (Exception e) { 48 e.printStackTrace(); 49 } 50 51 } 52 } 53 54 public static void main(String[] args) { 55 System.out.println("游戲體驗"); 56 BallGame game = new BallGame(); 57 game.launchFrame(); 58 } 59 } 小球左右移動

運行結果圖

③實現圓球上下彈動

1 import javax.swing.*; 2 import java.awt.*; 3 4 public class BallGame01 extends JFrame { 5 6 Image ball = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/ball.png"); 7 Image desk = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/desk.jpg"); 8 //小球的橫坐標 9 double x = 100; 10 //小球的縱坐標 11 double y = 100; 12 13 //弧度，此處就是60度 14 double degree = 3.14 / 3; 15 16 //畫窗口的方法 17 public void paint(Graphics g) { 18 System.out.println("窗體被畫了一次！"); 19 g.drawImage(desk, 0, 0, null); 20 g.drawImage(ball, (int) x, (int) y, null); 21 22 x = x + 10 * Math.cos(degree); 23 y = y + Math.sin(degree); 24 25 if (y > 500 - 40 - 30 || y < 40) { 26 degree = -degree; 27 } 28 if (x < 0 || x > 856) { 29 degree = 3.14 - degree; 30 } 31 } 32 33 //窗口加載 34 void launchFrame() { 35 setSize(856, 500); 36 setLocation(50, 50); 37 setVisible(true); 38 39 //重畫窗口,每秒畫25次 40 while (true) { 41 repaint(); 42 try { 43 Thread.sleep(40); 44 } catch (Exception e) { 45 e.printStackTrace(); 46 } 47 48 } 49 } 50 51 public static void main(String[] args) { 52 System.out.println("游戲體驗"); 53 BallGame01 game = new BallGame01(); 54 game.launchFrame(); 55 } 56 } View Code

運行結果圖

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2、三元運算符

1 public class TestOperator01 { 2 public static void main(String[] args) { 3 // boolean b1 = true; 4 // boolean b2 = false; 5 // System.out.println(b1 & b2); 6 // System.out.println(b1 ^ b2); 7 // System.out.println(b1 || b2); 8 // System.out.println(!b2); 9 // 10 //三元運算符 11 int score = 80; 12 String type = score<60?"不及格":"及格"; 13 System.out.println(type); 14 15 //條件判斷 16 if (score>60){ 17 System.out.println("及格"); 18 }else { 19 System.out.println("不及格"); 20 } 21 } 22 } View Code

運行結果圖

3、嵌套循環

1 import java.util.Scanner; 2 3 public class TestOperator01 { 4 public static void main(String[] args) { 5 for (int i = 1; i <= 5; i++) { 6 for (int j = 1; j <= 5; j++) { 7 System.out.print(i+"\t"); 8 } 9 System.out.println(" "); 10 } 11 } 12 } View Code

運行結果圖

4、嵌套循環打印九九乘法表

1 public class TestOperator01 { 2 public static void main(String[] args) { 3 for (int i = 1; i < 10; i++) { 4 for (int j = 1; j <= i; j++) { 5 System.out.print(j+"*"+i+"="+i*j+"\t"); 6 } 7 System.out.println(); 8 } 9 } 10 } View Code

運行結果圖

5、循環輸出1-1000之間能被5整除的數，且每行輸出5個

1 public class TestOperator01 { 2 public static void main(String[] args) { 3 int h = 0; 4 for (int i = 1; i <= 1000; i++) { 5 if (i%5==0){ 6 System.out.print(i+"\t"); 7 h++; 8 } 9 if (h==5){ 10 System.out.println(); 11 h=0; 12 } 13 } 14 } 15 } View Code

運行結果圖

轉載于:https://www.cnblogs.com/Anemia-BOY/p/10644452.html

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