how to compare two characters in java

1public class JavaCharacterCompareExample1 {  
2public static void main(String[] args) {  
3char firstValue = 'A';  
4char secondValue = 'B';  
5// compare the first char to the second  
6    int compareOneTwo = Character.compare(firstValue, secondValue);  
7    if (compareOneTwo> 0) {  
8    System.out.println("First value is greater than second value");  
9    }  
10    else {  
11System.err.println("First value is less than second value.");  
12    }  
13   }  
14}
15
16// OUT:  First value is less than the second value.
17

1If your input is a character and the characters you are checking against are mostly consecutive you could try this:
2
3if ((symbol >= 'A' && symbol <= 'Z') || symbol == '?') {
4    // ...
5}
6