How to create a string in java|| java tutorial||
#programmer Introduction to String in Java • A string is a sequence of characters. For example, “hello” is a string containing a sequence of characters ‘h’,’e’,’l’,’l’ and ‘o’. • We use double quotes to represent string in Java. Ex “hello”. • String is probably the most commonly used class in Java library. • String class is encapsulated under java.lang package. • In Java, every string that you create is actually an object of type String. • One important thing to notice about string object is that string objects are immutable that means once a string object is created it cannot be altered. • An array of characters works same as Java String. For example, //create a string String type=”Java programming”; //type is a variable Or char type[]={‘j’,’a’,’v’,’a’,’ ‘,’p’,’r’,’o’,’g’,’r’,a’,’m’,’m’,’I’,’n’,’g’}; Here, we have created a string variable named type. The variable is initialized with the string Java Programming. Creating a String There are many ways to create a string object in java, some of the popular ones are given below: o String literal o Using new Keyword String Literal This is the most common way of creating string. In this case a string literal is enclosed with double quotes. In java, Strings can be created like this: Assigning a string literal to a String instances: String str1=”Welcome”; When we create a string using double quotes, JVM looks in the string pool to find if any other String is stored with same value. If found, it just returns the reference to that String object else it creates a new String object with given value and stores it in the String pool. Using new Keyword we can create String object using new operator, just like any normal in java class. There are several constructors available in String class to get String from char array, byte array, StringBuffer and StringBuilder. String str=new String(“abc”); char[] a={‘a’,’b’,’c’}; String str=new string(a); Example 1: Create a String in Java package stringdemo.create; //Creating string in java public class FirstStrDemo { public static void main(String[] args) { String first="OOPS"; String second="in"; String third="Java Programming"; System.out.print(first); System.out.print(second); System.out.println(third); System.out.println(first+" "+second+" "+third); } } Java String Methods A string provides various methods to perform different operations on strings. We will look some of the commonly used string operations which are listed below. o String length() o String compareTo() o String concat() o String IsEmpty() o String Trim() o String toLowerCase() o String toUpper() #Coding #DeveloperLife #TechTalk #CodeSnippet #SoftwareDevelopment #WebDevelopment #CodeNewbie #ProgrammingTips #LearnToCode ============================================================= ? Do not forget to subscribe ? =============================================================
#programmer Introduction to String in Java • A string is a sequence of characters. For example, “hello” is a string containing a sequence of characters ‘h’,’e’,’l’,’l’ and ‘o’. • We use double quotes to represent string in Java. Ex “hello”. • String is probably the most commonly used class in Java library. • String class is encapsulated under java.lang package. • In Java, every string that you create is actually an object of type String. • One important thing to notice about string object is that string objects are immutable that means once a string object is created it cannot be altered. • An array of characters works same as Java String. For example, //create a string String type=”Java programming”; //type is a variable Or char type[]={‘j’,’a’,’v’,’a’,’ ‘,’p’,’r’,’o’,’g’,’r’,a’,’m’,’m’,’I’,’n’,’g’}; Here, we have created a string variable named type. The variable is initialized with the string Java Programming. Creating a String There are many ways to create a string object in java, some of the popular ones are given below: o String literal o Using new Keyword String Literal This is the most common way of creating string. In this case a string literal is enclosed with double quotes. In java, Strings can be created like this: Assigning a string literal to a String instances: String str1=”Welcome”; When we create a string using double quotes, JVM looks in the string pool to find if any other String is stored with same value. If found, it just returns the reference to that String object else it creates a new String object with given value and stores it in the String pool. Using new Keyword we can create String object using new operator, just like any normal in java class. There are several constructors available in String class to get String from char array, byte array, StringBuffer and StringBuilder. String str=new String(“abc”); char[] a={‘a’,’b’,’c’}; String str=new string(a); Example 1: Create a String in Java package stringdemo.create; //Creating string in java public class FirstStrDemo { public static void main(String[] args) { String first="OOPS"; String second="in"; String third="Java Programming"; System.out.print(first); System.out.print(second); System.out.println(third); System.out.println(first+" "+second+" "+third); } } Java String Methods A string provides various methods to perform different operations on strings. We will look some of the commonly used string operations which are listed below. o String length() o String compareTo() o String concat() o String IsEmpty() o String Trim() o String toLowerCase() o String toUpper() #Coding #DeveloperLife #TechTalk #CodeSnippet #SoftwareDevelopment #WebDevelopment #CodeNewbie #ProgrammingTips #LearnToCode ============================================================= ? Do not forget to subscribe ? =============================================================