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[PENDING: This could use more questions and some exercises.]
Check your answers.
- Recall the
WhileDemo
and
DoWhileDemo
programs.
public class WhileDemo { public static void main(String[] args) { String copyFromMe = "Copy this string until you encounter the letter 'g'."; StringBuffer copyToMe = new StringBuffer(); int i = 0; char c = copyFromMe.charAt(i); while (c != 'g') { copyToMe.append(c); c = copyFromMe.charAt(++i); } System.out.println(copyToMe); } }
public class DoWhileDemo { public static void main(String[] args) { String copyFromMe = "Copy this string until you encounter the letter 'g'."; StringBuffer copyToMe = new StringBuffer(); int i = 0; char c = copyFromMe.charAt(i); do { copyToMe.append(c); c = copyFromMe.charAt(++i); } while (c != 'g'); System.out.println(copyToMe); } }
- What would the output be from each program if you change the value of the string
copyFromMe
to"golly gee. this is fun."
?- Would the output from the two programs be the same? Defend your answer.
- Here's the
Sort
program again:
public class Sort { public static void main(String[] args) { int[] arrayOfInts = { 32, 87, 3, 589, 12, 1076, 2000, 8, 622, 127 }; for (int i = arrayOfInts.length; --i >= 0; ) { for (int j = 0; j < i; j++) { if (arrayOfInts[j] > arrayOfInts[j+1]) { int temp = arrayOfInts[j]; arrayOfInts[j] = arrayOfInts[j+1]; arrayOfInts[j+1] = temp; } } } for (int i = 0; i < arrayOfInts.length; i++) { System.out.print(arrayOfInts[i] + " "); } System.out.println(); } }
- Identify all of the control flow statements in the program.
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