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Java - replace part of string from given index
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In this article, we would like to show you how to replace part of string from given index in Java.
Quick solution:
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String text = "ABCD";2
String replacement = "xy";3
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int position = 1; // replace CD at index 15
int numberOfCharacters = 2; // number of characters to replace6
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String result = text.substring(0, position) + replacement + text.substring(position + numberOfCharacters);8
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System.out.println(text); // ABCD10
System.out.println(result); // AxyD
In this example, we replace part of the text string - CD at index 1 that is 2 characters long. To do so we use substring() method and + operator to add strings and receive the result.
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public class Example {2
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public static void main(String[] args) {4
String text = "ABCD";5
String replacement = "xy";6
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int position = 1; // we want to replace CD8
int numberOfCharacters = 2; // number of characters we want to replace9
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String result = text.substring(0, position) + replacement + text.substring(position + numberOfCharacters);11
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System.out.println("Original string: " + text); // ABCD13
System.out.println("Modified string: " + result); // AxyD14
}15
}Output:
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Original string: ABCD2
Modified string: AxyD