Java help!

[BaseballSTUD]

Can anyone explain to me how to use the char primitive data type? I need to check a string for a value and i know you can't do it with the string data type.

 

[m0ti]

please explain exactly what you have to do.

The string class has many utilarian methods.

 

[b4u]

Have you tried something like:


String testing = "1234abcd";

if(testing.compareTo("1234abcd")==0)
{
System.out.println("Checked OK!");
}

 

[gopunk]

you can do it with String.... use java.lang.regex or something with Pattern and Matcher.... or you can just write a while loop and the charAt method of String.

 

[m0ti]

Originally posted by: b4u
Have you tried something like:


String testing = "1234abcd";

if(testing.compareTo("1234abcd")==0)
{
System.out.println("Checked OK!");
}

You know you can use String.equals()

 

[wjsulliv]

If you are trying to check and see if a single character exists in a string you can use the y.charAt(i) function.

y.charAt(i) treats the string as an array of characters and returns the character in the i position of string y.

Say you had string "ZBCDEFG"
And wanted to know if 'V' was in the string.

presuming:
x = 'V'
y = "ZBCDEFG"

boolean find(char x, string y)
Char test = x
String source = y
Int stringLen = y.length()
boolean answer = false

for (int i = 0; i < stringLen; i++)
if y.CharAt(i) = x
boolean answer = true

return answer

 

[Softballslug]

Originally posted by: wjsulliv
If you are trying to check and see if a single character exists in a string you can use the y.charAt(i) function. y.charAt(i) treats the string as an array of characters and returns the character in the i position of string y. Say you had string "ZBCDEFG" And wanted to know if 'V' was in the string. presuming: x = 'V' y = "ZBCDEFG" boolean find(char x, string y) Char test = x String source = y Int stringLen = y.length() boolean answer = false for (int i = 0; i < stringLen; i++) if y.CharAt(i) = x boolean answer = true return answer

You would actually have tighter code using the IndexOf command...