asked on

String.replaceAll function

I know that if Java 1.4.2 I can use String.replaceall to replace all of the character I specified to another specified character .
However, I am using Java 1.3.1 and I can't use string.replaceall function. would somebody please teach me how to solve the problem ?

I want to have a function that does the same as string.replaceall. Thanks.

zzynx

What about
public String replace(char oldChar, char newChar)
?

zzynx

Write your own using the functions indexOf() and substring()

riaancornelius

just use a recursive function, that keeps replacing the character, until indexOf() returns -1:
something like this:

public String replaceAll(String oldString, String value, String newValue){
String newString = oldString.replace(oldValue, newValue)
if( newString.indexOf(value)!=-1 )
return replaceAll( newString, value, newValue );
else
return newString;
}

mikekwok

ASKER

What I want to do is :

Check for string if it contain ' , if it is true , then replace the single quote to 2 single quote .... ''

would you please help?

zzynx

char singleQuote = '\'';
char doubleQuote = '\"';
System.out.println("hello ' all !".replace(singleQuote,doubleQuote));

zzynx

>> single quote to 2 single quote
Sorry. The previous replaced the single quote by a double quote.

zzynx

>> replace the single quote to 2 single quote

public static String doubleTheQuotes(String input) {
StringBuffer buf = new StringBuffer(input.length());
for (int i=0; i<input.length(); i++) {
char c = input.charAt(i);
if (c=='\'')
buf.append("''"); // That's a double quote, a single quote, a single quote and a double quote ;°)
else
buf.append(c);
}
return buf.toString();
}

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zzynx

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