Right now I'm using switch so people can choose what they want to do. But in certain cases where there's an input of a String the program doesn't execute correctly. Instead of letting the user input any string it just runs the whole program. It also does this with if else.
/**
* @(#)Conversions.java
*
*
* @author
* @version 1.00 2008/2/26
*/
import java.util.*;
public class Conversions {
public static void main(String args[])
{
double choice;
Scanner input = new Scanner(System.in);
System.out.println("[1] Hex to binary. [2] Binary to decimal. [3] Binary to hex. [4] Decimal to any.");
choice = input.nextDouble();
if(choice == 1)
{
String hexNums;
System.out.println("Enter Hex number: ");
hexNums = input.nextLine();
}
else if(choice == 2)
{
System.out.println("Enter Binary number: ");
int binNums = input.nextInt();
}
else if(choice == 3)
{
System.out.println("Enter Binary number: ");
String binNumss = input.nextLine();
}
else if(choice == 4)
{
System.out.println("Enter Decimal number: ");
int decNums = input.nextInt();
System.out.println("Enter Base wanted: ");
int desiredBases = input.nextInt();
}
/*
switch(choice)
{
case 1:
String hexNums;
System.out.println("Enter Hex number: ");
hexNums = input.nextLine();
break;
case 2:
System.out.println("Enter Binary number: ");
int binNums = input.nextInt();
break;
case 3:
System.out.println("Enter Binary number: ");
String binNumss = input.nextLine();
break;
case 4:
System.out.println("Enter Decimal number: ");
int decNums = input.nextInt();
System.out.println("Enter Base wanted: ");
int desiredBases = input.nextInt();
break;
}*/
//The next 2 lines are used in all versions.
System.out.println("ABCD1234 Base-16 converts to " + BaseConverter.fromHexToBin("ABCD1234") +" in Base-2.\n");
System.out.println("E12B47F5 Base-16 converts to " + BaseConverter.fromHexToBin("E12B47F5") +" in Base-2.\n");
//The next 2 lines are used in the 90-point versions and above.
System.out.println("1011111011101111 Base-2 converts to " + BaseConverter.fromBinToDec("1011111011101111") +" in Base-10.\n");
System.out.println("11100100100110110 Base-2 converts to " + BaseConverter.fromBinToDec("11100100100110110") +" in Base-10.\n");
//The next line is used in the 95-point versions and above.
System.out.println("1011111011101111 Base-2 converts to " + BaseConverter.fromBinToHex("1011111011101111") + " in Base-16.\n");
//The next line is used in the 100-point versions and above.
System.out.println("11100100100110110 Base-2 converts to " + BaseConverter.fromBinToHex("11100100100110110") + " in Base-16.\n");
//The next 3 lines are useed in the 105 and 110-point versions.
System.out.println("1000 Base-10 converts to " + BaseConverter.fromDecToAny(1000,5) + " in Base-5.\n");
System.out.println("1000 Base-10 converts to " + BaseConverter.fromDecToAny(1000,8) + " in Base-8.\n");
System.out.println("200 Base-10 converts to " + BaseConverter.fromDecToAny(200,2) + " in Base-2.\n");
//This last line is only used in the 110 point version.
System.out.println("48879 Base-10 converts to " + BaseConverter.fromDecToAny(48879,16) + " in Base-16.\n");
}
}
class BaseConverter
{
public static String fromHexToBin(String hexNum)
{
String binNum = "";
for (int j = 0 ; j<hexNum.length(); j++)
switch (hexNum.charAt(j))
{
case '0' : binNum += "0000"; break;
case '1' : binNum += "0001"; break;
case '2' : binNum += "0010"; break;
case '3' : binNum += "0011"; break;
case '4' : binNum += "0100"; break;
case '5' : binNum += "0101"; break;
case '6' : binNum += "0110"; break;
case '7' : binNum += "0111"; break;
case '8' : binNum += "1000"; break;
case '9' : binNum += "1001"; break;
case 'A' : binNum += "1010"; break;
case 'B' : binNum += "1011"; break;
case 'C' : binNum += "1100"; break;
case 'D' : binNum += "1101"; break;
case 'E' : binNum += "1110"; break;
case 'F' : binNum += "1111"; break;
}
return binNum;
}
public static int fromBinToDec(String binNum)
{
int decNum = 0;
//decNum = Integer.parseInt(binNum,2);
String bin = binNum;
int indexplace;
int place;
char atplace;
long decnum = 0;
for(int d = binNum.length(); d>0; d--)
{
indexplace = d-1;
atplace = bin.charAt(indexplace);
place = bin.length() - d;
switch(atplace)
{
case '0': decNum += 0*(Math.pow(2,place)); break;
case '1': decNum += 1*(Math.pow(2,place)); break;
}
}
return decNum;
}
public static String fromBinToHex(String binNum)
{
String hexNum = "";
String bin = binNum;
int indexPlace;
int place;
int decQuotient;
int decRemainder;
String hexTemp1 = "";
String hexTemp2 = "";
char atPlace;
int decNum = 0;
for(int x = bin.length(); x > 0; x--)
{
indexPlace = x - 1;
atPlace = bin.charAt(indexPlace);
place = bin.length() - x;
switch(atPlace)
{
case '0': decNum += 0*(Math.pow(2,place));
break;
case '1': decNum += 1*(Math.pow(2,place));
break;
}
}
decQuotient = decNum;
while(decQuotient >= 1)
{
hexTemp2 = hexNum;
decRemainder = decQuotient % 16;
if (decRemainder > 9)
{
switch(decRemainder)
{
case 10: hexTemp1 = "A";
break;
case 11: hexTemp1 = "B";
break;
case 12: hexTemp1 = "C";
break;
case 13: hexTemp1 = "D";
break;
case 14: hexTemp1 = "E";
break;
case 15: hexTemp1 = "F";
break;
}
}
else
{
hexTemp1 = String.valueOf(decRemainder);
}
hexNum = hexTemp1 + hexTemp2;
decQuotient = decQuotient / 16;
}
return hexNum;
}
public static String fromDecToAny(int decNum, int desiredBase)
{
String newNum = "";
int dec = decNum;
int base = desiredBase;
int decQuotient;
String temp1 = "";
String temp2 = "";
int decRemainder;
decQuotient = dec;
while(decQuotient >= 1)
{
temp2 = newNum;
decRemainder = decQuotient % base;
if (decRemainder > 9)
{
switch(decRemainder)
{
case 10: temp1 = "A";
break;
case 11: temp1 = "B";
break;
case 12: temp1 = "C";
break;
case 13: temp1 = "D";
break;
case 14: temp1 = "E";
break;
case 15: temp1 = "F";
break;
}
}
else
{
temp1 = String.valueOf(decRemainder);
}
newNum = temp1 + temp2;
decQuotient = decQuotient / base;
}
return newNum;
}
}
Any help is appreciated to what I need to do.
Linear Mode
