Java StringBuilder delete() method

The delete(int start, int end) method of Java StringBuilder class is used to delete the substring from specified start index to exclusive end index of this sequence. If the start and end index were same then no deletion takes place and this sequence remains unchanged.

Syntax:

Parameter:

Returns:

The delete(int start, int end) method returns this object.

Exception:

StringIndexOutOfBoundsException - if start index is negative or any of index are greater than the length(), or the start index is greater than the end index.

Compatibility Version:

Java 1.5 and above

Example 1

Output:

string1 = javatpoint
After deleting = jaoint
string2 = let us learn java
After deleting = learn java

Example 2

Providing the negative (or less than 0) index in delete(int,int) method throws an exception.

Output:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -2
	at java.lang.AbstractStringBuilder.delete(Unknown Source)
	at java.lang.StringBuilder.delete(Unknown Source)
	at snippet.StringBuilderDeleteExample2.main(StringBuilderDeleteExample2.java:6)
string = javatpoint

Example 3

Providing the start index and end index as same value, no deletion take place and this sequence remains unchanged.

Output:

string = java code
After deleting = java code

Example 4

Taking the string input from a user in string builder and using in delete(int,int) method.

Output:

enter your string value: string builder
enter start index: 3
enter end index: 7
Count = strbuilder