Clock, Swimming Pool

1 package COM. FJ; 2 3 Import Java. util. calendar; 4 5/** 6 * Clock Class 7 * @ author junlin 8*9 */10 public class clock {11 private int hour; 12 private int minute; 13 private int second; 14 15 public clock () {16 calendar = calendar. getinstance (); 17 hour = calendar. get (calendar. hour_of_day); 18 minute = calendar. get (calendar. minute); 19 second = calendar. get (calendar. second); 20} 21 22 public void go () {23 second ++; 24 if (second> = 59) {25 second = 0; 26 minute ++; 27} 28 If (minute> = 59) {29 minute = 0; 30 hour ++; 31} 32 If (hour> = 23) {33 hour = 0; 34} 35} 36 37 public stringbuffer show () {38 stringbuffer time = new stringbuffer (); 39 if (hour <10) {40 time. append ("0"); 41} 42 time. append (hour + ":"); 43 If (minute <10) {44 time. append ("0"); 45} 46 Time. append (minute + ":"); 47 If (second <10) {48 time. append ("0"); 49} 50 time. append (second); 51 return time; 52} 53 54 public int gethour () {55 return hour; 56} 57 public void sethour (INT hour) {58 this. hour = hour; 59} 60 public int getminute () {61 Return minute; 62} 63 public void setminute (INT minute) {64 this. minute = minute; 65} 66 public int getsecond () {67 return second; 68} 69 public void setsecond (INT second) {70 this. second = Second; 71} 72 73}

 1 Clock clock = new Clock(); 2         for (int i = 0;i < 10; i++) { 3             clock.go(); 4             System.out.println(clock.show()); 5             try { 6                 Thread.sleep(1000); 7             } catch (InterruptedException e) { 8                 e.printStackTrace(); 9             }10         }

Swimming Pool

1 package COM. FJ; 2/** 3 * Pool 4 * @ author junlin 5*6 */7 public class circle {8 private double radius; 9 10 public double getarea () {11 double area = math. pI * radius; 12 return area; 13} 14 15 public double getcircumference () {16 double circumference = 2 * Math. pI * radius; 17 return circumference; 18} 19 20 public double getradius () {21 return radius; 22} 23 24 public void setradius (double radius) {25 this. radius = radius; 26} 27 28 29}

1 circle circle1 = new circle (); 2 circle circle2 = new circle (); 3 double radius = integer. parseint (joptionpane. showinputdialog ("Enter the pool radius:"); 4 circle1.setradius (RADIUS); 5 circle2.setradius (radius + 3); 6 system. out. printf ("decoration aisles need %. 2f RMB! \ N ", (circle2.getarea ()-circle1.getarea () * 10); 7 system. Out. printf (" wall repair requires %. 2f RMB! ", Circle2.getcircumference () * 8 );

 

Clock, Swimming Pool