实验3 /*  * @(#)AverageNumbers2  *  * Copyright 2008 School of Software, Yunnan University.  *                                  All rights reserved  */ package cn.edu.ynu.sei.Java_Labs.Lab3; /**  * 求1－50的平均数  * @version 1.0.0.0 Jan 22, 2008  * @author eleven  */ public class AverageNumbers2 {     private double result1;     private double sum1;     private double result2;     private double sum2;     /**      * 使用for循环计算      */     public double DeterminAverageUsingFor(int startNumber, int endNumber) {         for (int i = startNumber; i <= endNumber; i++) {             sum1 += i;             result1 = sum1 / 50;         }         return result1;     }     /**      * 使用while循环计算      */     public double DeterminAverageUsingWhile(int startNumber, int endNumber) {         int i = startNumber;         while (i <= endNumber) {             sum2 += i;             result2 = sum2 / 50;             i++;         }         return result2;     }     public static void main(String[] args) {         AverageNumbers2 an2 = new AverageNumbers2();         double finalResult1 = an2.DeterminAverageUsingFor(1, 50);         double finalResult2 = an2.DeterminAverageUsingWhile(1, 50);         System.out.println("average of numbers is " + finalResult1 + ", which is calculated by for loop.");         System.out.println("average of numbers is " + finalResult2 + ", which is calculated by while loop.");     } } /*  * @(#)BreakLoop  *  * Copyright 2008 School of Software, Yunnan University.  *                                  All rights reserved  */ package cn.edu.ynu.sei.Java_Labs.Lab3; /**  *  显示数字1－10，但是在5处跳出，并且打印  * @version 1.0.0.0 Jan 23, 2008  * @author eleven  */ public class BreakLoop {     public BreakLoop() {         for (int i = 1; i <= 10; i++) {             if (i < 5) {                 System.out.println("Count = " + i);             }             if (i == 5) {                 System.out.println("Broke out of the loop at count = " + i);                 break;             }         }     }     public static void main(String[] args) {         BreakLoop bl = new BreakLoop();     } } /*  * @(#)ContinueLoop  *  * Copyright 2008 School of Software, Yunnan University.  *                                  All rights reserved  */ package cn.edu.ynu.sei.Java_Labs.Lab3; /**  *  * @version 1.0.0.0 Jan 23, 2008  * @author eleven  */ public class ContinueLoop {     private int j;     public ContinueLoop() {         for (int i = 1; i <= 10; i++) {             if (i < 5) {                 System.out.println("Count = " + i);             }             if (i == 5) {                 j = i;                 continue;             } else {                 System.out.println("Count = " + i);             }         }         System.out.println("Used continue statement to skip printing" + j);     }     public static void main(String[] args) {         ContinueLoop cl = new ContinueLoop();     } }