Matching decimals in strings using matcher()
I have a question regarding the matcher. Currently I am trying to read a string and store all the digits into an array. My question is, how do you try to match both integers and decimals?
I have an array of doubles called:
double[] thisArray = new double[20];
Into this array, i am trying to store all 开发者_高级运维the numbers I extract from the string.
Matcher temp = Pattern.compile("(\d+)").matcher(x);
That is my function for the matcher. But this only matches integers. I want to match both integers and decimals like (5.2). But how do I do this? I want to be able to enter in both integers and decimals into my string.
Any help would be appreciated. Thanks!
This will handle both integer and decimals:-
private Pattern p = Pattern.compile("\\d+(\\.\\d+)?");
@Test
public void testInteger() {
Matcher m =p.matcher("10");
assertTrue(m.find());
assertEquals("10", m.group());
}
@Test
public void testDecimal() {
Matcher m =p.matcher("10.99");
assertTrue(m.find());
assertEquals("10.99", m.group());
}
The phrase \d+
will match a string of numbers. So what about adding a dot between two of them? (\d+)|(\d+|\.\d+)
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