Methods in Java String Class

Java String class is method rich. We have a lot of methods in Java, we can perform operations on the string such as trimming, concatenating, converting, comparing, replacing strings etc.

 

1. Java String Concat() method – This method is used to contact specified string at the end of source String.

Example –

String str1=”Easy”;  

str1.concat(“Bix”);  

System.out.println(str1);  

output –  EasyBix

 

2. Java String charAt() method –  This method return the charter at the given index. Index starts from 0.

Example –

String str=”EASY”;  

char c=str.charAt(3);

System.out.println(c);

Output – Y

 

Selenium Testing Video Tutorial:

 

3. Java String contains() method – This method searches the target string in the source String. It returns result true and false. True if the string is present otherwise return false.

Example –

String str= “Hello, I am on EasyBix”;  

System.out.println(name.contains(“am on”));  

Output – true

 

4. Java String endsWith() method – This method verify that source string ends with given suffix or not and return the result in true/false.

Example –

String str= “Hello, I am on EasyBix”;  

System.out.println(name.endsWith(“Bix”));  

Output – true

 

5. Java String indexof() method – This method return the index value of given character/String in the source String.

Example –

String str=”Hello, I am on EasyBix “;    

int index1=str1.indexOf(“on”);

System.out.println(index1);

Output – 12

 

6. Java String isEmpty() method – This method verify the String, that it is empty or not. This method returns the result in true or false.

Example –

String str=” “;    

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

Output – true

 

7. Java string replaceAll() method – This method replace all the characters with the given character and return the modified string.

Example –

String str=”SeleniumBix”;  

String replaceString=str.replaceAll(“e”,”i”);

System.out.println(replaceString);  

Output – SiliniumBix

 

8. Java String subString() method – This method return the part of String. In this method, we pass the index number as argument and It will return the String from the given Index number.

Example –

String str=”SeleniumBix”;  

System.out.println ( str.subString (2,6) ); 

System.out.println ( str.subString(2) );  

Output – leniu

                leniumBix

 

9. Java String lowerCase() & upperCase() methods – Methos lowerCase() is used to convert the given String into lowercase string and upperCase() is used to convert the String into upperCase String.

Example –

String str=”SELENIUM”; 

String str1 = “bix”; 

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

System.out.println ( str1.upperCase() );  

Output – selenium

               BIX

1 Comment
  1. Pratik Jain 7:58 PM / June 25, 2017 - Reply

    String str1=”Easy”;
    str1.concat(“Bix”);
    System.out.println(str1);
    output – EasyBix

    This example is wrong..

    Correct will be

    String str1=”Easy”;
    String str2 =str1.concat(“Bix”);
    System.out.println(str2);
    output – EasyBix

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