Java String getChars()

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The java string getChars() method copies the content of this string into specified char array. There are 4 arguments passed in getChars() method.

Internal implementation

void getChars(char dst[], int dstBegin) 
{  
        System.arraycopy(value, 0, dst, dstBegin, value.length);  
    }

The method getChars() is used for copying String characters to an Array of chars.


public void getChars(int srcBegin, int srcEnd, char[] dest, int destBegin)
Parameters description:

  • srcBegin – index of the first character in the string to copy.

  • srcEnd – index after the last character in the string to copy.

  • dest – Destination array of characters in which the characters from String gets copied.

  • destBegin – The index in Array starting from where the chars will be pushed into the Array.

It throws IndexOutOfBoundsException – If any of the following conditions occurs:

(srcBegin<0) srcBegin is less than zero. (srcBegin>srcEnd) srcBegin is greater than srcEnd.

(srcEnd > length of string) srcEnd is greater than the length of this string.

(destBegin<0) destBegin is negative.

dstBegin+(srcEnd-srcBegin) is larger than dest.length.

Returns

It doesn't return any value.

Throws

It throws StringIndexOutOfBoundsException if beginIndex is greater than endIndex.

Example: getChars() method

public class Test
{
   public static void main(String args[])
      {
       String str = new String("This is a String Handling Tutorial");
       char[] array = new char[6];
       str.getChars(10, 16, array, 0);
       System.out.println("Array Content:" );
       for(char temp: array){
           System.out.print(temp);
       }

       char[] array2 = new char[]{'a','a','a','a','a','a','a','a'};
       str.getChars(10, 16, array2, 2);
       System.out.println("Second Array Content:" );
       for(char temp: array2)
      {
    	   System.out.print(temp);
       }
   }	
}


Output:

Array Content:
StringSecond Array Content:
aaString
Java String getChars() method example

public class Test
{  
public static void main(String args[])
    {  
 String str = new String("hello cprogramcoding what are u doing");  
      char[] ch = new char[30];  
      try{  
         str.getChars(6, 20, ch, 0);  
         System.out.println(ch);  
      }catch(Exception ex){System.out.println(ex);}  
}
}


Output:

cprogramcoding
Java String getChars() Method Example

It throws an exception if index value exceeds array range.


public class Test 
{  
    public static void main(String[] args) 
      {  
        String str = new String("Welcome to cprogramcoding");  
        char[] ch  = new char[30];  
        try {  
            str.getChars(0, 19, ch, 0);  
            System.out.println(ch);  
        } catch (Exception e) {  
            System.out.println(e);  
        }  
    }  
}


Output:

Welcome to cprogram



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