Coding

Question 1

Import

Answer 1

import javax.swing.*;

Question 2

Class

Answer 2

public class ________
{
}

Question 3

Main Method

Answer 3

public static void main (String [] args)
{
}

Question 4

Print

Answer 4

System.out.println(____);

Question 5

Allows the user to input string

Answer 5

String ____ = JOptionPane.showInputDialog(“_____”);

Question 6

Variable WORDS

Answer 6

String _____ = “____”;

Question 7

Variable INTEGER

Answer 7

int ______ = _______;

Question 8

Allows users to input integer

Answer 8

int ____ = Integer.parseInt (JOptionPane.showInputDialog (“________”));

Question 9

Variable REAL NUMBER

Answer 9

double _______ = _______;

Question 10

Allows users to input real number

Answer 10

double ______ = Double.parseDouble(JOptionPane.showInputDialog(“_____”));

Question 11

Addition

Answer 11

+

Question 12

Subtraction

Answer 12

-

Question 13

Multiplication

Answer 13

*

Question 14

Division

Answer 14

/

Question 15

String -> int

Answer 15

String a = “______”;
int i = Integer.parseInt(a);

Question 16

int -> double

Answer 16

int i = ____;
double d = i;

Question 17

char -> int (ASCII value)

Answer 17

char c = ‘___’;
int i = (int)(c);

Question 18

int -> String

Answer 18

int i = ___;
String num = i + “”;

Question 19

String -> char

Answer 19

String name = “___”;
char c = name.charAt(___);

Question 20

char -> double

Answer 20

char r = ‘___’;
int i = (int) (r);
double d = i;

Question 21

Give char value for what the user inputs

Answer 21

char ____ = JOptionPane.showInputDialog(“___”).charAt(__);

Question 22

Prints specific letters from words in char

Answer 22

System.out.println(___.charAt(___));

Question 23

If statement numbers & true and false

Answer 23

if (ask == true)
{

}
If (ask == false)
{

}

Question 24

Boolean

Answer 24

boolean ask = Boolean.parseBoolean(JOptionPane.showInputDialog(“_______”));

Question 25

Incrementing

Answer 25

num++;

Question 26

Decrementing

Answer 26

num- -;

Question 27

Modulus number

Answer 27

int/double num = ______.parse____(JOptionPane.showInputDialog(“Enter a number”)); if (num%2 == 0) { ______ } if (num%2 == 1) { _____ }

Question 28

Print char for whole word

Answer 28

System.out.println(word.substring(__,__));

Question 29

if statement words

Answer 29

if (_____.equals(_____)) { _____ } if (_____.equals(____)) { ____ }

Question 30

if statement words (ignore case)

Answer 30

if (____.equalsIgnoreCase(____)) { } else { }

Question 31

Find the length of a word

Answer 31

int len = ____.length();

Question 32

Find the last letter of the word

Answer 32

char lastlet = ____.charAt(len-1);

Question 33

Stop the programme

Answer 33

System.exit(0);

Question 34

Print f to display columns

Answer 34

System.out.printf(“%-30s%-30s%-30s\n” , “______”, “______”, “______” ); - (start from LHS) + (start from RHS) 30s (the number of spaces you need)

Question 35

char to String (not wanting to add ASCII values, but just join letters)

Answer 35

String a = JOptionPane.showInputDialog(“Enter a word”); char firstlet = a.charrAt(0); int asciiplus1 = (int)(firstlet+1); char afterlet = (char)(asciiplus1); String afterletstring = “ “ + afterlet + __________;

Question 36

Escape sequence for the next line

Answer 36

\n

Question 37

Escape sequence for the next tab

Answer 37

\t

Question 38

Method of the Math class: power

Answer 38

Math.pow(___,power no.);

Question 39

Method of the Math class: square root

Answer 39

Math.sqrt(____);

Question 40

Method of the Math class: round off

Answer 40

Math.round(____);

Question 41

Method of the Math class: absolute value (make it positive)

Answer 41

Math.abs(____);

Question 42

Method of the Math class: random (range of numbers)

Answer 42

int num = (int)(Math.random()*(max - min + 1)) + min; double num = Math.random(); outputs from 0 - 1

Question 43

Method of the Math class: rounding off more than one decimal place. E.g. 2 decimal places

Answer 43

double num = ______; num = num*100; num = Math.round(num); num = num/100;

Question 44

PI, field of the Math class

Answer 44

double area = Math.PI*Math.pow(_____,2);

Question 45

String method to Upper case & Lower case

Answer 45

String ______ = ______.toUpperCase(); String ______ = ______.toLowerCase();

Question 46

Correct way to instantiate a String

Answer 46

String ___ = new String (“____”);

Question 47

Relational Operators

Answer 47

> and < >= and <= (greater than equal to and less than equal to) != and == (not equal and equal)

Question 48

Show Message Dialog

Answer 48

JOptionPane.showMessageDialog(null, _____ , “TITLE OF THE MESSAGE BOX”, JOptionPane.PLAIN_MESSAGE) Message options: PLAIN_MESSAGE ERROR_MESSAGE INFORMATION_MESSAGE WARNING_MESSAGE QUESTION_MESSAGE

Question 49

Find the first digit of a number (2 digit no.)

Answer 49

int digit1 = ______/10;

Question 50

Find the second digit of a number (2 digit no.)

Answer 50

int digit2 = ______%10;

Question 51

The middle letter of a word (odd)

Answer 51

String word = “_____”; int len = word.length(); int middle = (int)(len/2); char midlet = word.charAt(middle);

Question 52

First half and second half of a word (even)

Answer 52

String word = “____”; int len = word.length(); String firsthalf = word.substring(0,len/2); String secondhalf = word.substring(len/2);