Thread: java programming assignment help

how to code this one??

1. Create a program that accepts character input then determine whether it is letter, number or a symbol. If it is a letter, display whether it is Uppercase or lowercase letter. If it is a digit, display its square root. (Note: Use Character and JOptionPane class)
Use the following predefined methods:
isLetter( )
isDigit( )
charAt( )
length( )
sqrt( )
showConfirmDialog( )
SAMPLE OUTPUT 1:
Enter a character: 9
The character is a digit.
The square root of 9 is 3.0
Try again?[Y/N]
SAMPLE OUTPUT 2:
Enter a character: *
The character is a symbol.
Try again?[Y/N]
SAMPLE OUTPUT 3:
Enter a character: A
The character is an Uppercase letter.
Try again?[Y/N]
SAMPLE OUTPUT 4:
Enter a character: string10
Invalid Input. Input a character only.
Try again?[Y/N]

if i can code even if a little of it i will do it but i really do not know how to start coding it...because we didnt study it..it is been an activity already

may i ask if how will i include it to my code?

i do not know where to add the -0 to my program... or in short the one that you are telling to me sir

ok i got it thanks.

but another problem why my program doesn't output The character is a symbol. if i input * but if i input $ it will output The character is a symbol.

import javax.swing.*;
public class aa {
 
    public static void main(String args[]) {
 
    	String input;
    	char inputs;
    	double x;
    	 input=JOptionPane.showInputDialog(null,"Enter a character :");
    	 inputs= input.charAt(0);
    	 if (Character.getType(inputs) == Character.LOWERCASE_LETTER){ 
        System.out.println("Lowercase");
    	 }
    	 else if(Character.getType(inputs) == Character.UPPERCASE_LETTER){	 
        System.out.println("Uppercase");
    	 }
    	 else if(Character.getType(inputs) == Character.CURRENCY_SYMBOL){
    	 System.out.println("The character is a symbol.");
    	 }
    	 else if(Character.isDigit(inputs)){
		int num = inputs - '0';
    	 System.out.println("The character is a digit.");
    	 System.out.println("The square root of " + inputs + " is " + Math.sqrt(num));
    	 }
 
 
 
 
 
    	 }
 
    }

if i input *.. my jcreator will not post anything instead process complete

i tried your idea sir but still my program still doesnt recognize * as a symbol

i already add else then if i input * it will output The character is a symbol. but is there other way that when you input * and it will output The character is a symbol. with using else?? instead else if or if only?

thank you again for the help..
but what are the different keys that can be called sa symbol in java??
also how can i insert the isLetter() for my code below(what will i change to make it isLetter()

import javax.swing.*;
public class aa {
 
    public static void main(String args[]) {
 
    	String input= "*";
    	char inputs;
    	double x;
    	int loop=0;
    	while (loop == JOptionPane.YES_OPTION) {
    	 input=JOptionPane.showInputDialog(null,"Enter a character :");
    	 inputs= input.charAt(0);
    	 if (Character.getType(inputs) == Character.LOWERCASE_LETTER){ 
        JOptionPane.showMessageDialog(null,"Lowercase");
    	 }
    	 else if(Character.getType(inputs) == Character.UPPERCASE_LETTER){	 
        JOptionPane.showMessageDialog(null,"Uppercase");
    	 }
    	 else if(Character.getType(inputs) == Character.CURRENCY_SYMBOL || inputs == '*' ){
    	 JOptionPane.showMessageDialog(null,"The character is a symbol.");
    	 }
    	 else if(Character.isDigit(inputs)){
		int num = inputs - '0';
    	 JOptionPane.showMessageDialog(null,"The character is a digit.");
    	 JOptionPane.showMessageDialog(null,"The square root of " + inputs + " is " + Math.sqrt(num));
    	 }
    	 loop = JOptionPane.showConfirmDialog(null, "Try again?[Y/N]", "repeat", JOptionPane.YES_NO_OPTION);
    	 if(loop == JOptionPane.NO_OPTION){
		JOptionPane.showMessageDialog(null,"Thank You For Using The Program");
		}
        }
 
 
 
 
 
    	 }
 
    }

i want it to lest it from my code in the LowerCase And UpperCase part to my program..

about this
SAMPLE OUTPUT :
Enter a character: string10
Invalid Input. Input a character only.

how will i do this will i use lenght()?? help again please thank you

import javax.swing.*;
public class aa {
 
    public static void main(String args[]) {
 
    	String input= "*";
    	char inputs;
    	double x;
    	int loop=0;
    	while (loop == JOptionPane.YES_OPTION) {
    	 input=JOptionPane.showInputDialog(null,"Enter a character :");
    	 inputs= input.charAt(0);
    	 if (Character.getType(inputs) == Character.LOWERCASE_LETTER){ 
        JOptionPane.showMessageDialog(null,"Lowercase");
    	 }
    	 else if(Character.getType(inputs) == Character.UPPERCASE_LETTER){	 
        JOptionPane.showMessageDialog(null,"Uppercase");
    	 }
    	 else if(Character.getType(inputs) == Character.CURRENCY_SYMBOL || inputs == '*' ){
    	 JOptionPane.showMessageDialog(null,"The character is a symbol.");
    	 }
    	 else if(Character.isDigit(inputs)){
		int num = inputs - '0';
    	 JOptionPane.showMessageDialog(null,"The character is a digit.");
    	 JOptionPane.showMessageDialog(null,"The square root of " + inputs + " is " + Math.sqrt(num));
    	 }
    	 else{
    	 	JOptionPane.showMessageDialog(null,"The character is a symbol.");
    	 }
    	 loop = JOptionPane.showConfirmDialog(null, "Try again?[Y/N]", "repeat", JOptionPane.YES_NO_OPTION);
    	 if(loop == JOptionPane.NO_OPTION){
		JOptionPane.showMessageDialog(null,"Thank You For Using The Program");
		}
        }
 
 
 
 
 
    	 }
 
    }

if i will input string10 or any not char size value the program prints out Invalid Input. Input a character only.

also about the isLetter i want it to be Place In The LowerCase And UpperCase

import javax.swing.*;
public class aa 
{
 
    public static void main(String args[]) 
    	{
 
    	String input= "*";
    	char inputs;
    	double x;
    	int loop=0;
    	while (loop == JOptionPane.YES_OPTION) 
    		{
    	 input=JOptionPane.showInputDialog(null,"Enter a character :");
    	 inputs= input.charAt(0);
    	 if (Character.getType(inputs) == Character.LOWERCASE_LETTER)
    	 { 
             JOptionPane.showMessageDialog(null,"Lowercase");
    	 }
    	 else if(Character.getType(inputs) == Character.UPPERCASE_LETTER)
    	 {	 
             JOptionPane.showMessageDialog(null,"Uppercase");
    	 }
    	 else if(Character.getType(inputs) == Character.CURRENCY_SYMBOL || inputs == '*' )
    	 {
    	     JOptionPane.showMessageDialog(null,"The character is a symbol.");
    	 }
    	 else if(Character.isDigit(inputs))
    	 {
		int num = inputs - '0';
    	 JOptionPane.showMessageDialog(null,"The character is a digit.");
    	 JOptionPane.showMessageDialog(null,"The square root of " + inputs + " is " + Math.sqrt(num));
    	 }
    	 else
    	 {
    	 	JOptionPane.showMessageDialog(null,"The character is a symbol.");
    	 }
    	 loop = JOptionPane.showConfirmDialog(null, "Try again?[Y/N]", "repeat", JOptionPane.YES_NO_OPTION);
    	 if(loop == JOptionPane.NO_OPTION)
    	 {
		    JOptionPane.showMessageDialog(null,"Thank You For Using The Program");
		 }
            }
    	}
 
}

how will i test the length??and how will it confirm that the input is not a character?


about the isLetter because i want that isLetter can be found to my source code is there a place where i can place it?/