Check whether a character sequence is present in a String
contains(CharSequence cs) method of String class can be used to check whether a character or word or sentence is contained in a string.
This method returns true if the character sequence is present in the string and false if character sequence is not present in the String. i.e return type is boolean.
Example 1
class StringTest{
public static void main(String args[]){
String str1=new String("ProgramZools is a developer's site");
boolean ispresent=str1.contains("developer");
if(ispresent==true){
System.out.println("'developer' is present in the string");
}
else{
System.out.println("'developer' is not present in the string");
}
}
}
Output 1
'developer' is present in the string
Example 2
class StringTest{
public static void main(String args[]){
String str1=new String("ProgramZools is a developer's site");
String str2="123";
if(str1.contains(str2)==true){
System.out.println("'123' is present in the string");
}
else{
System.out.println("'123' is not present in the string");
}
}
}
Output 2
'123' is not present in the string