Fun With Strings Example Code

Java Code:

This program provides some example Java code of how to work with the String class. It shows the use of String Literals, manipulation of

, as well as converting them to numbers and back again.

public class FunWithStrings {

 public static void main(String[] args) {
 
 //Use a string literal to assign a value to the String
 String address = "I live at 22b Baker Street!";
 
 //The same string but using Unicode values
 String unicodeAddress = "\u0049\u0020\u006C\u0069\u0076\u0065"
 + "\u0020\u0061\u0074\u0020\u0032\u0032\u0042\u0020"
 + "\u0042\u0061\u006B\u0065\u0072\u0020\u0053\u0074"
 + "\u0072\u0065\u0065\u0074\u0021";
 
 System.out.println("Here is Sherlock's address: " + address); 
 System.out.println("It even works using Unicode characters: " + unicodeAddress); 
 
 //A char array can be used to make a String
 char characterArray[] = {'C', 'h', 'a','r','a','c','t','e','r','s'};
 String characterString = new String(characterArray);
 
 //or even a byte arrray
 byte byteArray[] = {67,104,97,114,97,99,116,101,114,115};
 String byteString = new String(byteArray);
 
 System.out.println("Char Array: " + characterString);
 System.out.println("Byte Array: " + byteString);
 
 
 //Dealing with unusual characters by using the Unicode value
 String footballPlayer = "Thomas M\u00FCller plays for Germany.";
 System.out.println(footballPlayer);
 
 //Escape sequences for characters
 String speech = "\"I say old chap\", he said to me";
 String backSlashNewLine = "The cat was \\grining\\ from ear to ear. Or"
 + " here to\n\n\n here.";
 System.out.println(speech);
 System.out.println(backSlashNewLine);
 

 //Looking for Who in The Who
 String bandName = "The Who";
 int index = bandName.indexOf("Who");
 
 System.out.println("I found Who at position " + index);
 
 String newBandName = bandName.substring(0,index);
 
 //The Who is now The Clash
 newBandName = newBandName + "Clash";
 System.out.println("Let's change the band name to " + newBandName);
 
 //Convert a string number to an actual number
 String number = "10"; 
 int convertedNumber = Integer.valueOf(number).intValue();
 System.out.println("The number " + convertedNumber);
 
 //Converting to a differnt number type.
 int numberTwenty = 20;
 String converted = Double.toString(numberTwenty);
 System.out.println(converted);
 
 //Time to trim some spaces
 String tooManySpaces = " Neil Armstrong.. ";
 tooManySpaces = tooManySpaces.trim();


 //lexicographically Apple precedes Pear!
 String firstString = "Apple";
 String secondString = "Pear";

 if (firstString.compareTo(secondString) 

Read More

The String Literal

By Paul Leahy

More Reading

The articles that go with this program code are: The String Class, The String Literal, Comparing Strings and Manipulating Strings.