public class Main
{
public static void main(String[] args) {
String s1="JAVA";
StringBuilder s2=new StringBuilder(s1);
System.out.println(s1.compareTo(s2)==s2.compareTo(s1));
}
}

public class Main
{
public static void main(String[] args) {
int i=0;
addTwo(i++);
System.out.println(i);
}
static void addTwo(int i){
i+=2;
}
}

public enum TrafficLight
{
RED("Stop"),YELLOW("Caution"),GREEN("Go");
private String action;
TrafficLight(String action){
this.action=action;
}
public static void main(String[] args) {
TrafficLight green=new TrafficLight("Go");
System.out.println(GREEN.equals("green"));
}
}

import java.util.*;
public class Main
{
public static void main(String[] args) {
Collection<String> words=new ArrayList();
words.add("Don't");
words.add("change");
words.add("me!");
System.out.println("Before : "+words);
for(String word:words){
System.out.print(word.toUpperCase()+"_");
}
System.out.println();
System.out.println("After : "+words);
}
}

Which declaration can be inserted at (1) without using a compilation error?
interface IConstants
{
int radius=42;
int side=69;
//(1) INSERT CODE HERE
}
Select the two correct answer.

(a)final double circumference= 2*Math.PI*radius;
(b)int total=total+radius+side;
(c)int AREA=radius*side;
(d)public static MAIN=15;
(e)protected int CODE = 31337;

public class Main{
public static void main (String[] args) {
int i=0;
int[] a={3,6};
a[i]=i=9;
System.out.println(i+" "+a[0]+" "+a[1]);
}
}

public class Main{
public static void main (String[] args) {
String s="Contenment!";
int middle=s.length()/2;
String n=s.substring(middle-1,middle+1);
System.out.println(s.lastIndexOf(n,middle));
}
}

Which statement are true?
A)The expression (1+2+"3") evaluates to the String "33".
B)The expression ("1"+2+3) evaluates to the String "15".
C)The expression (4+1.0f) evaluates to the float value 5.0f.
D)The expression (10/9) evaluates to the int value 1.
E)The expression ('a'+1) evaluates to the char value 'b'.

interface A{
public void aaa();
}
class AA implements A{
public void aaa(){
System.out.println("Hi");
}
}
class D extends AA{
public class Exa{
public void aaa(){
System.out.println("Wow");
}
public void main (String[] args) {
A a=new D();
a.aaa();
}
}
public void aaa(){
System.out.println("Bye");
}
}