Difference between revisions of "Debugging Practice"
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Line 53: | Line 53: | ||
|Solution=The solution... | |Solution=The solution... | ||
+ | |SolutionCode= | ||
+ | <pre> | ||
+ | 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 + 1 ); | ||
+ | |||
+ | if( nextSpace != -1 ) | ||
+ | { | ||
+ | currWord = input.substring( lastSpace, nextSpace + 1 ); | ||
+ | } | ||
+ | else | ||
+ | { | ||
+ | currWord = input.substring( lastSpace, input.length() ); | ||
+ | } | ||
+ | |||
+ | reversedWord = ""; | ||
+ | for( int j = currWord.length() - 1; j >= 0; j-- ) | ||
+ | { | ||
+ | reversedWord = reversedWord + currWord.charAt( j ); | ||
+ | } | ||
+ | |||
+ | result = result + reversedWord; | ||
+ | lastSpace = nextSpace; | ||
+ | } | ||
+ | |||
+ | JOptionPane.showMessageDialog( null, result, "Reversed Words", | ||
+ | JOptionPane.INFORMATION_MESSAGE ); | ||
+ | } | ||
+ | } | ||
+ | </pre> | ||
}} | }} |
Revision as of 12:28, 6 April 2010
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ProblemFind the bugs in the code provided below. Hint: there are three. 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 ); } } |
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SolutionThe solution... | ||
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