Chapter 3- Introduction to Strings

A string is a sequence of characters. A string is instantiated as follows:

String name;

name = new String(“Aryadeep”);

package com.company;

public class strings {
    public static void main(String[] args) {
        String name=new String("Aryadeep"); // you can also write as, String name="Aryadeep";
        System.out.println(name);

    }
}

/*
Aryadeep
 */

String is a class but can be used as a data type.

Strings are immutable and cannot be changed.

String name="Aryadeep"

(Here, name is a reference, and “Aryadeep” is an object.)

Different ways to print in Java

We can use the following ways to print in Java:

• System.out.print() // No newline at the end
• System.out.println() // Prints a new line at the end
• System.out.printf()
• System.out.format()

System.out.printf("%c",ch)

  %d for int

  %f for float

  %c for char

  %s for string

Code as written in the video

package com.company;
import java.util.Scanner;

public class cwh_13_strings {
    public static void main(String[] args) {
        // String name = new String("Harry");
        // String name = "Harry";
        // System.out.print("The name is: ");
        // System.out.print(name);
        int a = 6;
        float b = 5.6454f;
        System.out.printf("The value of a is %d and value of b is %8.2f", a, b);
        //System.out.format("The value of a is %d and value of b is %f", a, b);
        Scanner sc = new Scanner(System.in);
//        String st = sc.next();
//        String st = sc.nextLine();
//        System.out.println(st);

    }
}

Tags: Java Java Basics Java Strings