CODEWITHSUNDEEP
javaeclipsestringindexingsubstring
user2755494
user2755494

Reputation: 11

replace substring defined by start and end index points?

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?

Upvotes: 1

Views: 2599

Answers (2)

Saj
Saj

Reputation: 18702

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!

Upvotes: 0

Pshemo
Pshemo

Reputation: 124215

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)

Upvotes: 2

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