實驗3 /* ?* @(#)AverageNumbers2 ?* ?* Copyright 2008 School of Software, Yunnan University. ?*????????????????????????????????? All rights reserved ?*/ package cn.edu.ynu.sei.Java_Labs.Lab3; /** ?* 求1－50的平均數 ?* @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循環計算 ???? */ ??? public double DeterminAverageUsingFor(int startNumber, int endNumber) { ??????? for (int i = startNumber; i <= endNumber; i++) { ??????????? sum1 += i; ??????????? result1 = sum1 / 50; ??????? } ??????? return result1; ??? } ??? /** ???? * 使用while循環計算 ???? */ ??? 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; /** ?*? 顯示數字1－10，但是在5處跳出，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(); ??? } }

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