JAVA PROGRAMMING Suppose that s1, s2, and s3 are three strings, given as follows

Question

JAVA PROGRAMMING

Suppose that s1, s2, and s3 are three strings, given as follows String s1 = "Welcome to Java". String s2 = "Programming is fun". String s3- "Welcome to Java" hat are the results of the following expressions? (a) s1 = s2 (b) s2 =-33 (c) s1.equals(s2) (d) s1.equals(s3) (e) s1.compare To(s2) (f) s2.compareTo(s3) (g) s2.compareTo(s2) (h) s1.charAt(0) (i) s1.indexOf(j') (j) s1.indexOf("to") (k) s1.lastlndexOf('a') (I) s1.lastlndexOf("o", 15) (m) s1.length() (n) s1.substring(5) (o) s1.substring(5, 11) (p) s1.startsWith("Wel") (q) s1.endsWith("Java") (r) s1.toLowerCase() (s) s1.toUpperCase() (t) s1.concat(s2) (u) s1.contains(s2) (v)" Wel ".trim)

Explanation / Answer

Answers :

(a) false
(b) false
(c)   false
(d)   true
(e)   7
(f)   -7
(g)   0
(h)   W
(i)   -1
(j)   8
(k)   14
(l)   9
(m)   15
(n)   me to Java
(O)   me to
(p)   true
(q)   true
(r)   welcome to java
(s)   WELCOME TO JAVA
(t)   Welcome to JavaProgramming is fun
(u)   false
(v)   Wel

Java Program:

public class CompareTo {

public static void main(String args[]){

   String s1 ="Welcome to Java";

   String s2 = "Programming is fun";

   String s3 = "Welcome to Java";

   System.out.println(s1 == s2);

   System.out.println(s2 == s3);

   System.out.println(s1.equals(s2));

   System.out.println(s1.equals(s3));

   System.out.println(s1.compareTo(s2));

   System.out.println(s2.compareTo(s3));

   System.out.println(s2.compareTo(s2));

   System.out.println(s1.charAt(0));

   System.out.println(s1.indexOf('j'));

   System.out.println(s1.indexOf("to"));

   System.out.println(s1.lastIndexOf('a'));

   System.out.println(s1.lastIndexOf("o",15));

   System.out.println(s1.length());

   System.out.println(s1.substring(5));

   System.out.println(s1.substring(5,11));

   System.out.println(s1.startsWith("Wel"));

   System.out.println(s1.endsWith("Java"));

   System.out.println(s1.toLowerCase());

   System.out.println(s1.toUpperCase());

   System.out.println(s1.concat(s2));

   System.out.println(s1.contains(s2));

   System.out.println(" Wel ".trim());

}

}

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