replace substring defined by start and end index points?

Question

I am working with this piece of code:

start = str.indexOf('<');
finish = str.indexOf('>');
between = str.substring(start + 1, finish);
replacement = str.substring(start, finish + 1);
System.out.println(between + " " + replacement); //for debug purposes
forreplacement = JOptionPane.showInputDialog(null, "Enter a " + between);
System.out.println(forreplacement); //for debug purposes
counter = counter - 1;

where "str" is the String that is being worked with. How do I replace the substring "replacement" with the string "forreplacement" (what is entered into the popup box) within the string str?

Maybe I just don't understand. Please give an expected input-output. — Sotirios Delimanolis
– Sotirios Delimanolis, Commented Sep 6, 2013 at 19:31

Pshemo · Accepted Answer · 2013-09-06 19:45:04Z

2

Not sure if that is what you want but maybe take part before start, add forreplacemeent and after that add part after finish like

String result = str.substring(0, start)+forreplacement+str.substring(finish+1);

Or if you want to replace all occurrences of replacement with forreplacement you can also use

String result = str.replace(replacement, forreplacement)

answered Sep 6, 2013 at 19:45

Pshemo

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Saj · Accepted Answer · 2013-09-06 19:50:08Z

0

Your question is not clear. If you want to replace, you can do something like-

String str = "Hello World!";
String replacement = "World";
String stringToReplaceWith = "Earth";

str = str.replace(replacement, stringToReplaceWith);

System.out.println(str); // This prints Hello Earth!

answered Sep 6, 2013 at 19:50

Saj

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