Please use Netbeans The international standard letternumber

Please use Netbeans

The international standard letter/number mapping found on the telephone is shown below: Write a program that prompts the user to enter a letter and displays its corresponding number. Enter a letter: A The corresponding number is 2 Enter a letter: a The corresponding number is 2 Enter a letter: + + is an invalid input

Solution

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package javaapplication1;

import java.util.Scanner;

/**
*
* @author johns
*/
public class Corresponding_Number {
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
int ch;
String letter;
do{
System.out.println(\"1.Proceed\ 2. Exit\ Enter You Choice:\");
ch = sc.nextInt();
switch (ch) {
case 1:
System.out.println(\"Enter a Letter : \");
letter = sc.next();
if(letter.equals(\"A\") || letter.equals(\"a\") || letter.equals(\"B\") || letter.equals(\"b\") || letter.equals(\"C\") || letter.equals(\"c\")){
System.out.println(\"The corresponding number is 2\");
}
if(letter.equals(\"D\") || letter.equals(\"d\") || letter.equals(\"E\") || letter.equals(\"e\") || letter.equals(\"F\") || letter.equals(\"f\")){
System.out.println(\"The corresponding number is 3\");
}
if(letter.equals(\"G\") || letter.equals(\"g\") || letter.equals(\"H\") || letter.equals(\"h\") || letter.equals(\"I\") || letter.equals(\"i\")){
System.out.println(\"The corresponding number is 4\");
}
if(letter.equals(\"J\") || letter.equals(\"j\") || letter.equals(\"K\") || letter.equals(\"k\") || letter.equals(\"L\") || letter.equals(\"l\")){
System.out.println(\"The corresponding number is 5\");
}
if(letter.equals(\"M\") || letter.equals(\"m\") || letter.equals(\"N\") || letter.equals(\"n\") || letter.equals(\"O\") || letter.equals(\"o\")){
System.out.println(\"The corresponding number is \");
}
if(letter.equals(\"P\") || letter.equals(\"p\") || letter.equals(\"Q\") || letter.equals(\"q\") || letter.equals(\"R\") || letter.equals(\"r\") || letter.equals(\"S\") || letter.equals(\"s\")){
System.out.println(\"The corresponding number is 7\");
}
if(letter.equals(\"T\") || letter.equals(\"t\") || letter.equals(\"U\") || letter.equals(\"u\") || letter.equals(\"V\") || letter.equals(\"v\")){
System.out.println(\"The corresponding number is 8\");
}
if(letter.equals(\"W\") || letter.equals(\"w\") || letter.equals(\"X\") || letter.equals(\"x\") || letter.equals(\"Y\") || letter.equals(\"y\") || letter.equals(\"Z\") || letter.equals(\"z\")){
System.out.println(\"The corresponding number is 9\");
}
break;
}
}while(ch!=2);
}
}