StringBuffer insert() in Java

The StringBuffer.insert() method inserts the string representation of given data type at given position in a StringBuffer.

Syntax:

 str.insert(int position,  char x);
 str.insert(int position,  boolean x);
 str.insert(int position,  char[] x);
 str.insert(int position, float x);
 str.insert(int position, double x);
 str.insert(int position, long x);
 str.insert(int position, int x);

position is the index in string where
we need to insert.

Return:

This method returns a reference to this object.

Exception:

The position argument must be greater
than or equal to 0, and less than 
or equal to the length of this string.

Boolean Input

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// Java program to demonstrate StringBuffer insert
// for boolean input.  
import java.lang.*;
  
public class GFG {
    public static void main(String[] args)
    {
        StringBuffer str = 
             new StringBuffer("geeks for geeks");
        System.out.println("string = " + str);
  
        // insert boolean value at offset 8
        str.insert(8, true);
  
        // prints stringbuffer after insertion
        System.out.print("After insertion = ");
        System.out.println(str.toString());
    }
}

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Output:


string = geeks for geeks
After insertion = geeks fotruer geeks





Character Input











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// Java program to demonstrate StringBuffer insert 


// for char input.   


import java.lang.*; 


  


public class GFG { 


    public static void main(String[] args) 


    { 


        StringBuffer str =  


           new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


  


        // insert boolean value at offset 8 


        str.insert(8, 'p'); 


  


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


    } 


} 



















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Output:


string = geeks for geeks
After insertion = geeks fopr geeks





Character Array Input











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// Java program to demonstrate StringBuffer insert 


// for char array input.   


import java.lang.*; 


  


public class GFG { 


    public static void main(String[] args) 


    { 


        StringBuffer str =  


               new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


  


        // character array to be inserted 


        char cArr[] = { 'p', 'a', 'w', 'a', 'n' }; 


  


        // insert character array at offset 9 


        str.insert(8, cArr); 


  


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


    } 


} 



















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Output:


string = geeks for geeks
After insertion = geeks fopawanr geeks





Float Input











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// Java program to demonstrate StringBuffer insert 


// for float input. 


import java.lang.*; 


  


public class GFG  


{ 


    public static void main(String[] args) 


    { 


        StringBuffer str = 


            new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


          


        // insert float value at offset 3 


        str.insert(8, 41.35f); 


          


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


   }       


} 



















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Output:


string = geeks for geeks
After insertion = geeks fo41.35r geeks





Double Input











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// Java program to demonstrate StringBuffer insert 


// for double input. 


import java.lang.*; 


  


public class GFG  


{ 


    public static void main(String[] args) 


    { 


        StringBuffer str =  


           new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


          


        // insert float value at offset 3 


        str.insert(8, 41.35d); 


          


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


   }       


}



















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Output:


string = geeks for geeks
After insertion = geeks fo41.35r geeks





Long Input











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// Java program to demonstrate StringBuffer insert 


// for Long input. 


import java.lang.*; 


  


public class GFG  


{ 


    public static void main(String[] args) 


    { 


        StringBuffer str = new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


          


        // insert float value at offset 3 


        str.insert(8, 546986L); 


          


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


   }       


}



















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Output:


string = geeks for geeks
After insertion = geeks fo546986r geeks





Int Input











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// Java program to demonstrate StringBuffer insert 


// for Int input. 


import java.lang.*; 


  


public class GFG  


{ 


    public static void main(String[] args) 


    { 


        StringBuffer str =  


            new StringBuffer("geeks for geeks"); 


        System.out.println("string = " + str); 


          


        // insert float value at offset 8 


        int x = 10; 


        str.insert(8, x); 


          


        // prints stringbuffer after insertion 


        System.out.print("After insertion = "); 


        System.out.println(str.toString()); 


   }       


}



















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Output:


string = geeks for geeks
After insertion = geeks fo10r geeks






          
          
          
          

            

    

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