Computer Applications
State the data type and values of a and b after the following segment is executed:
String s1 = "Computer", s2 = "Applications"
a = (s1.compareTo(s2));
b = (s1.equals(s2));
Answer
Data type of a is int and value is 2. Data type of b is boolean and value is false.
Explanation
compareTo() method compares two strings lexicographically and returns the difference between the ASCII values of the first differing characters in the strings. Thus, a will be of int data type and store the value 2 as the difference between ASCII values of 'A' and 'C' is 2.
equals() method compares two String objects and returns true if the strings are same, else it returns false. Thus, b will be of boolean data type and result in false as both the strings are not equal.
Related Questions
The output of the statement "CONCENTRATION".indexOf('T') is:
- 9
- 7
- 6
- (-1)
Which of the following returns a String?
- length()
- charAt(int)
- replace(char, char)
- indexOf(String)
Write a Java program to enter any sentence and convert the sentence to uppercase. Print only those words of the sentence whose first and last letters are the same.
The following code to compare two strings is compiled, the following syntax error was displayed – incompatible types – int cannot be converted to boolean.
Identify the statement which has the error and write the correct statement. Give the output of the program segment.
void calculate() { String a = "KING", b = "KINGDOM"; boolean x = a.compareTo(b); System.out.println(x); }