Chapter 4, Problem 10RE

a.

Program Plan Intro

Program:

//Define the class "Sample"

public class Sample

{

    //Define the main method

    public static void main(String[] args)

    {

        /*Create a string and

         assign the value to it*/

          String s = "Hello";

          String t = "World";

          //Print the statement

         System.out.println(s.length()+t.length());

         System.out.println(s.substring(1,2));

 System.out.println(s.substring(s.length() / 2,    s.length()));

          System.out.println(s+t);

          System.out.println(t+s);

    }

}

Output:

10

e

llo

HelloWorld

WorldHello

b.

Explanation of Solution

 Value of the second expression:

• In the above given program, two strings such as “s” and “t” are created and are assigned with values “Hello”, and “World” respectively.
• The given expression is “s.substring(1,2)”.
• In Java programming, the operation s...

c.

Explanation of Solution

 Value of the third expression:

• In the above given program, two strings such as “s” and “t” are created and are assigned with values “Hello”, and “World” respectively.
• The given expression is “s.substring(s.length() / 2,    s.length())”.
• In Java programming, the String length method is used to get the length of a Java string.
  • It returns the number of characters written in the string.
• Here, the length of the string “s” is 5.
• Thus, (s...

d.

Explanation of Solution

 Value of the fourth expression:

• In the above given program, two strings such as “s” and “t” are created and are assigned with values “Hello”, and “World” respectively.
• The given expression is “s+t”.
• In Java programming language, the “+” operator is used to concatenate two strings.
• Consider that given two strings and the user want to concatenate them to one long string...

e.

Explanation of Solution

 Value of the fifth expression:

• In the above given program, two strings such as “s” and “t” are created and are assigned with values “Hello”, and “World” respectively.
• The given expression is “t+s”.
• In Java programming language, the “+” operator is used to concatenate two strings.
• Consider that given two strings and the user want to concatenate them to one long string...