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JAVA Strings

JAVA Strings
The class string belongs to ................. package.

java.lang
java.string
java.awt
java.applet

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JAVA Strings
String str1 = "Kolkata".replace('k', 'a');In the above statement, the effect on string Kolkata is

Displays error message
All characters k are replaced by a.
The first occurrence of k is replaced by a.
All characters a are replaced by k.

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JAVA Strings
What is the output of the following println statement?String str1 = "Hellow";System.out.println(str1.indexOf('t'));

false
1
0
-1
true

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JAVA Strings
What could be output of the following fragment of code?public class Test{ public static void main(String args[]){ String x = "hellow";int y = 9;System.out.println(x += y); } }

9hellow
None of these
Throws an exception as string and int are not compatible for addition
hellow9
Compilation error

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JAVA Strings
What will be the output of the following program?public class Test{ public static void main(String args[]){String s1 = "java";String s2 = "java";System.out.println(s1.equals(s2));System.out.println(s1 == s2); }}

false true
false false
true false
true true

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JAVA Strings
What will be the output?public class Test{ public static void main (String[] args){ String test = "a1b2c3"; String[] tokens = test.split("\\d"); for(String s: tokens) System.out.print(s); } }

Runtime exception thrown
Compilation error
abc
123

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