Question

A) Declare a String variable called myString0 and initialize it to "Java".

B) Declare a String variable called myString1 and initialize it to "Programming".

C) Declare a String variable called myString2 and initialize it to "Language".

D) Print the concatenation of myString0 + " is a " + myString1 + " " + myString2 + ".".

E) Print the sum of the lengths of myString1 and myString2 (must call the length() method).

F) Print the 2nd, 4th, and 7th character of myString1 (must use the charAt() method), separated by commas.

G) Print the index of 'a' in myString0 (must use the indexOf() method).

H) Print myString2 converted to uppercase (must use the toUpperCase() method).

I) Print the 3rd through 8th character of myString1 (must use the substring() method).

J) Declare a String called myString3 and set it to "Whatever!", you must use the 'new' operator.

K) Declare a String called myString4 and set it to "Whatever!", you must use the 'new' operator.

L) Print a comparison of the two strings using (myString3 == myString4).

M) Print a comparison of the two strings using (myString3.equals(myString4)).

N) Declare three char variables c0, c1, and c2 with the values '^', 'G', and '7'.

O) Print the characters, separated by semicolons.

P) Print the ASCII value of the characters, separated by commas.
HINT: Use a typecast of the character from char to int.

Answer 1

import java.lang.*;
import java.util.*;
public class Main
{
   public static void main(String[] args) {
   String myString0="Java";//A declares myString0
   String myString1="Programming";//B declares myString1
   String myString2="Language"; //C declares myString2
   String result1=myString0+" is a "+myString1+" "+myString2+".";//D concatanation
   System.out.println(result1);//printing
   System.out.println("Sum of lengths of String1 and String2"+myString1.length()+myString2.length());//e sum of lengths
   System.out.println(myString1.charAt(1)+","+myString1.charAt(3)+","+myString1.charAt(6));//F charAt position printing
   System.out.println("Index of a in String1 is "+myString1.indexOf('a'));//G getting indexOf a
   System.out.println("UppeCase of myString2 is "+myString2.toUpperCase());//H converting into UpperCase
   System.out.println("Substring in string1 is "+myString1.substring(2,8));//I finding substring
   String myString3=new String("Whatever!");//J declares String3 using new
   String myString4=new String("Whatever!");//K declares String4 using new
   System.out.println("Comparision of String3 and String4 using == "+(myString3==myString4));//L both are not refering to same object so false
   System.out.println("Comparision of String3 and String4 using equals "+myString3.equals(myString4));//M both string values are equal so true
   char c0='^',c1='G',c2='7';//N declares Characters
   System.out.println(c0+":"+c1+":"+c2);//O printing chars
   System.out.println("ascii values of chars are "+(int)c0+","+(int)c1+","+(int)c2);//printing ascii values
   }
}