Question

Give the output
String x1 = "concatination";

System.out.println(x1.indexOf(x1.charAt(9))+x1.lastIndexOf(x1.charAt(7)));
System.out.println(x1.replace('n','r').equals(x1.substring(7)));

Answer 1

Output:

17

false

Explanation:

Given,

String x1 = "concatination";

I. x1.indexOf(x1.charAt(9)) + x1.lastIndexOf(x1.charAt(7))

x1.indexOf('t') + x1.lastIndexOf('n')

5 + 12

Hence, 17.

II. x1.replace('n','r').equals(x1.substring(7))

"corcatination".equals("concati")

Obviously, false.