Yours风之恋

摘要： public class ThreeOut { public static void main(String[] args) { boolean[] arr = new boolean[500]; for(int i = 0; i 1) { if(arr[index] == true) { countNum ++; if(countNum == 3) { countNum = 0; arr[index] = false; leftCount --; } } index ++; if(index == arr.... 阅读全文

摘要： public class TestSort { public static void main(String[] args) { Date[] days = new Date[5]; days[0] = new Date(2004, 8, 6); days[1] = new Date(2007, 4, 6); days[2] = new Date(2007, 4, 9); days[3] = new Date(2004, 4, 6); days[4] = new Date(2004, 4, 5); bubbleSort(days); for(int i = 0; i ... 阅读全文

摘要： public class Test { public static void main(String[] args) { if(args.length < 3) { System.out.println(" ==!"); System.exit(-1); } double d1 = Double.parseDouble(args[0]); double d2 = Double.parseDouble(args[2]); double d = 0; if(args[1].equals("+")) { d = d1 + d2; } else if(ar 阅读全文

摘要： public class Test { public static void main(String[] args) { int a[] = { 3, 9, 8}; //静态初始化 Date days1 [] = { new Date(1, 4, 2004), new Date(2, 4, 2004), new Date(3, 4, 2004) }; //动态初始化 Date [] days2 = new Date[3]; for (int i = 0; i < 3; i++) { days2[i] = new Date(2004, 5,... 阅读全文

摘要： public class Test { public void regist(int num) throws MyException { if(num < 0) { throw new MyException("人数为负值，不合理", 3); } System.out.println("登记人数" + num); } public void manager(int k) { try { regist(k); } catch(MyException me) { System.out.println("登记出错，出错类型：" + m 阅读全文

摘要： interface Valuable { public double getMoney();}interface Protectable { public void beProtected();}interface A extends Protectable { void m();}abstract class Animal { private String name; abstract void enjoy(); public void setName(String name) { this.name = name; } public String getName() { return... 阅读全文

摘要： // 实现多态三个条件：// 1，继承// 2，父类引用指向子类对象// 3，重写public class Test { public static void main(String[] args) { Cat c = new Cat("KIKI", "Blue"); Dog d = new Dog("Tom", "Black"); Lady l1 = new Lady("Sheery", c); Lady l2 = new Lady("Dianl", d); l1.myPe 阅读全文

摘要： public class Test { public static void main(String[] args) { Animal a = new Animal("name"); Cat c = new Cat("Tom", "Blue"); Dog d = new Dog("Pipi", "Black"); System.out.println(a instanceof Animal); System.out.println(c instanceof Animal); System.out 阅读全文