My doubts ..
Is it permissible to perform the floating-point number% module operation in java, and why? Because in compilers such as c ++ this operation is not allowed.
How do I access an element of a string and change it? Example, I have a string. String s="wave"; How to change the 0 position of the element by a letter the carousel?
Is it allowed to access a String as an array? example str [i].
1:
class Teste {
public static void main(String[] args) {
System.out.println(6.25 % 2.5);
}
}
Output: 1.25.
2: String s are immutable! That is, you would have to create a new String instead of changing the existing one. For example:
String s = "ola";
String s2 = "x" + s.substring(1);
System.out.println(s2);
The output is xla .
3: No. But you can do something like this:
String s = "teste";
char[] array = s.toCharArray();
array[2] = 'x';
String s2 = new String(array);