the characters from sourceStart through sourceEnd1. The array that will receive the characters
is specified by target. The index within target at which the substring will be copied is passed
in targetStart. Care must be taken to assure that the target array is large enough to hold the
number of characters in the specified substring.
The following program demonstrates getChars( ):
class getCharsDemo {
public static void main(String args[]) {
String s = "This is a demo of the getChars method.";
int start = 10;
int end = 14;
char buf[] = new char[end - start];
s.getChars(start, end, buf, 0);
System.out.println(buf);
}
}
Here is the output of this program:
demo
getBytes( )
There is an alternative to getChars( ) that stores the characters in an array of bytes. This method
is called getBytes( ), and it uses the default character-to-byte conversions provided by the
platform. Here is its simplest form:
byte[ ] getBytes( )
Other forms of getBytes( ) are also available. getBytes( ) is most useful when you
are exporting a String value into an environment that does not support 16-bit Unicode
characters. For example, most Internet protocols and text file formats use 8-bit ASCII for
all text interchange.
toCharArray( )
If you want to convert all the characters in a String object into a character array, the easiest
way is to call toCharArray( ). It returns an array of characters for the entire string. It has this
general form:
char[ ] toCharArray( )
This function is provided as a convenience, since it is possible to use getChars( ) to achieve
the same result.
String Comparison
The String class includes several methods that compare strings or substrings within strings.
Each is examined here.
Search WWH :
