StringBuffer delete() Method in Java with Examples
Last Updated :
02 Feb, 2022
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The java.lang.StringBuffer.delete() is an inbuilt method in Java which is used to remove or delete the characters in a substring of this sequence. The substring starts at a specified index start_point and extends to the character at the index end_point.
Syntax :
java
java
java
java
public StringBuffer delete(int start_point, int end_point)Parameters : The method accepts two parameters of integer type: start_point - This refers to the beginning index and is included in the count. end_point - This refer to the ending index and is excluded from the count. Return Value : The method returns the string after deleting the substring formed by the range mentioned in the parameters. Exceptions : StringIndexOutOfBoundsException occurs if the start_point is negative, greater than length(), or greater than the end_point. Examples :
Input: String = "Apple"
start_point = 2
end_point = 4
Output: Ape
Input: String = "GeeksforGeeks"
start_point = 2
end_point = 7
Output: GerGeeks
Below programs illustrate the java.lang.StringBuffer.delete() method:
Program 1:
// Java program to illustrate the
// java.lang.StringBuffer.delete()
import java.lang.*;
public class geeks {
public static void main(String[] args)
{
StringBuffer sbf = new StringBuffer("Geeksforgeeks");
System.out.println("string buffer = " + sbf);
// Deleting characters from index 2 to 7
sbf.delete(6, 8);
System.out.println("After deletion string buffer is = " + sbf);
}
}
Output:
Program 2:
string buffer = Geeksforgeeks After deletion string buffer is = Geeksfgeeks
// Java program to illustrate the
// java.lang.StringBuffer.delete()
import java.lang.*;
public class geeks {
public static void main(String[] args)
{
StringBuffer sbf = new StringBuffer("Welcome to Geeksforgeeks");
System.out.println("string buffer = " + sbf);
// deleting characters from index 5 to index 9
sbf.delete(5, 9);
System.out.println("After deletion string buffer is = " + sbf);
}
}
Output:
Program 3: Here the index is negative.
string buffer = Welcome to Geeksforgeeks After deletion string buffer is = Welcoo Geeksforgeeks
// Java program to illustrate the
// java.lang.StringBuffer.delete()
import java.lang.*;
public class geeks {
public static void main(String[] args)
{
StringBuffer sbf = new StringBuffer("Welcome to Geeksforgeeks");
System.out.println("string buffer = " + sbf);
sbf.delete(-5, 9);
System.out.println("After deletion string buffer is = " + sbf);
}
}
Output:
Program 4: Here the index is not present.
Exception in thread "main" java.lang.StringIndexOutOfBoundsException:
String index out of range: -5
at java.lang.AbstractStringBuilder.delete(AbstractStringBuilder.java:756)
at java.lang.StringBuffer.delete(StringBuffer.java:430)
at geeks.main(geeks.java:13)
// Java program to illustrate the
// java.lang.StringBuffer.delete()
import java.lang.*;
public class geeks {
public static void main(String[] args)
{
StringBuffer sbf = new StringBuffer("Welcome to Geeksforgeeks");
System.out.println("string buffer = " + sbf);
sbf.delete(99, 109);
System.out.println("After deletion string buffer is = " + sbf);
}
}
Output:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException
at java.lang.AbstractStringBuilder.delete(AbstractStringBuilder.java:760)
at java.lang.StringBuffer.delete(StringBuffer.java:430)
at geeks.main(geeks.java:13)
