Difference between revisions of "Debugging Practice"
From CompSciWiki
Line 8: | Line 8: | ||
public class WordReversal | public class WordReversal | ||
{ | { | ||
− | public static void main( String[] args ) | + | public static void main( String[] args ) |
{ | { | ||
int lastSpace = 0; | int lastSpace = 0; | ||
Line 15: | Line 15: | ||
String reversedWord = ""; | String reversedWord = ""; | ||
String currWord = ""; | String currWord = ""; | ||
− | + | ||
String input = JOptionPane.showInputDialog( "Enter a sentence:" ); | String input = JOptionPane.showInputDialog( "Enter a sentence:" ); | ||
− | while( nextSpace >= 0 ) | + | while( nextSpace >= 0 ) |
{ | { | ||
nextSpace = input.indexOf( ' ', lastSpace ); | nextSpace = input.indexOf( ' ', lastSpace ); | ||
− | + | ||
− | if( nextSpace != -1 ) | + | if( nextSpace != -1 ) |
{ | { | ||
− | currWord = input.substring( lastSpace, nextSpace ); | + | currWord = input.substring( lastSpace, nextSpace + 1 ); |
− | + | } | |
− | for( int j = | + | else |
− | + | { | |
− | + | currWord = input.substring( lastSpace, input.length() ); | |
− | + | } | |
+ | |||
+ | for( int j = currWord.length() - 1; j >= 0; j-- ) | ||
+ | { | ||
+ | reversedWord = reversedWord + currWord.charAt( j ); | ||
} | } | ||
− | + | ||
result = result + reversedWord; | result = result + reversedWord; | ||
} | } | ||
− | + | ||
− | JOptionPane.showMessageDialog( null, result, "Reversed Words", | + | JOptionPane.showMessageDialog( null, result, "Reversed Words", |
− | + | JOptionPane.INFORMATION_MESSAGE ); | |
} | } | ||
} | } |
Revision as of 12:26, 6 April 2010
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ProblemFind the bugs in the code provided below. Hint: there are lots import javax.swing.JOptionPane; public class WordReversal { public static void main( String[] args ) { int lastSpace = 0; int nextSpace = 0; String result = ""; String reversedWord = ""; String currWord = ""; String input = JOptionPane.showInputDialog( "Enter a sentence:" ); while( nextSpace >= 0 ) { nextSpace = input.indexOf( ' ', lastSpace ); if( nextSpace != -1 ) { currWord = input.substring( lastSpace, nextSpace + 1 ); } else { currWord = input.substring( lastSpace, input.length() ); } for( int j = currWord.length() - 1; j >= 0; j-- ) { reversedWord = reversedWord + currWord.charAt( j ); } result = result + reversedWord; } JOptionPane.showMessageDialog( null, result, "Reversed Words", JOptionPane.INFORMATION_MESSAGE ); } } |
SideSectionTitle
An image or By Students section | |
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SolutionThe solution... | ||
CodeSolutionCode goes here. Please DO NOT put your code in <pre> tags! |