Java – Compare a Char Using equals Method

java

If I am scanning from a text

Scanner s= new Scanner("texto.txt");

// I want to compare the next char from the line with a <

// like this:

if(s.nextChar().equals("<")){
.....

I know that s.nextChar() does not exist but there is any similar thing to use in this case?

Best Answer

Your code would something like...

Scanner s= new Scanner("texto.txt");
s.useDelimiter("");
while (s.hasNext()) {
    if(s.nextChar()=='<'){
 .....
}

Note that after the call of s.nextChar(), the value is actually fetched, so its better to keep the variable, if you would like to use it further, like:

char ch = s.nextChar();

Related Solutions

Java Char Comparison – Comparing Chars in Java

If your input is a character and the characters you are checking against are mostly consecutive you could try this:

if ((symbol >= 'A' && symbol <= 'Z') || symbol == '?') {
    // ...
}

However if your input is a string a more compact approach (but slower) is to use a regular expression with a character class:

if (symbol.matches("[A-Z?]")) {
    // ...
}

If you have a character you'll first need to convert it to a string before you can use a regular expression:

if (Character.toString(symbol).matches("[A-Z?]")) {
    // ...
}

Best Answer

Related Solutions

Java Char Comparison – Comparing Chars in Java

Related Question