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The Optimum Method to Concatenate Strings in Java is the concat() method.This method appends one String to the end of another. The method returns a String with the value of the String passed into the method, appended to the end of the String, used to invoke this method.ExampleLive Demopublic class Test { public static void main(String args[]) { String s = "Strings are immutable"; s = s.concat(" all the time"); System.out.println(s); } } OutputStrings are immutable all the time
We all know that the String class in Java is mutable i.e. once we create a String variable we cannot modify its data or do any manipulations.But, there may be scenarios where we need to modify the data of String variables. In such cases, we could use StringBuffer class.This class −is like a String, but can be modified. It contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls.Is safe for use by multiple threads.
To sort, use ORDER BY SUBSTRING(). Let us first create a table −mysql> create table DemoTable -> ( -> Value varchar(40) -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2321/78/54-6') -> ; Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('2321/78/54-8'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('2321/78/54-5'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('2321/78/54-9'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement ... Read More
The concat() method of the String class concatenates the specified string to the end of this string.ExampleLive Demoimport java.lang.*; public class StringDemo { public static void main(String[] args) { // print str1 String str1 = "self"; System.out.println(str1); // print str2 concatenated with str1 String str2 = str1.concat(" learning"); System.out.println(str2); // prints str3 concatenated with str2(and str1) String str3 = str2.concat(" center"); System.out.println(str3); } }Outputself self learning self learning center
You can concatenate strings using the ‘+’ operator of Java.ExampleLive Demopublic class Test { public static void main(String args[]){ String st1 = "Hello"; String st2 = "How"; String st3 = "You"; String res = st1+st2+st3; System.out.println(res); } }OutputHelloHowYou
You can concatenate two strings using the concat() method of the String class. This class concatenates the specified string to the end of this string.ExampleLive Demopublic class Test { public static void main(String args[]){ String str1 = "Krishna"; String str2 = "Kasyap"; System.out.println(str1.concat(str2)); } }OutputkrishnaKasyap
The concat() method of the String class concatenates the specified string to the end of this string.Exampleimport java.lang.*; public class StringDemo { public static void main(String[] args) { // print str1 String str1 = "self"; System.out.println(str1); // print str2 concatenated with str1 String str2 = str1.concat(" learning"); System.out.println(str2); // prints str3 concatenated with str2(and str1) String str3 = str2.concat(" center"); System.out.println(str3); } }Outputself self learning self learning center
You can create a String by -Assigning a string value wrapped in " " to a String type variable.String message = "Hello Welcome to Tutorialspoint";Creating an object of the String class using the new keyword by passing the string value as a parameter of its constructor.String message = new String ("Hello Welcome to Tutorialspoint");Passing a character array to the String constructor.char arr[] = {'H','e','l','l','o'}; String message = new String(arr);
For this, use ORDER BY clause. Let us first create a table −mysql> create table DemoTable -> ( -> StudentCode varchar(20) -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('101J'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('100A'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('100B'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('101S'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('103M'); Query OK, 1 row affected (0.15 ... Read More
To import any package in the current class you need to use the import keyword asimport packagename;ExampleLive Demoimport java.lang.String; public class Sample { public static void main(String args[]) { String s = new String("Hello"); System.out.println(s); } }OutputHello