I am trying to compare an array (of strings) to a regular string from an input. Is this possible? I have my test code and it's mostly just says
incomparable types java.lang.string and java.lang.string[]
This is my test code:
String[] yes = new String[5];
yes[0] = "yes";
yes[1] = "yeah";
yes[2] = "sure";
yes[3] = "yupp";
yes[4] = "okay";
System.out.println("Input");
String input = scan.next();
if ((input).equalsIgnoreCase(yes)) {
System.out.println("compared!");
}
The most efficient solution will be to create a set of Strings and then call set.contains to see if the input string is present in the set. Sample code:
HashSet<String> stringSet = new HashSet<String>();
//All string are already lower case so no need of toLowerCase() here
stringSet.add("yes");
stringSet.add("yeah");
stringSet.add("sure");
stringSet.add("yupp");
stringSet.add("okay");
System.out.println("Input");
String input = scan.next();
if (stringSet.contains(input.toLowerCase())) {
System.out.println("compared!");
}
Set<String> stringSet = new HashSet<String>(); (code to interface) then: Collections.addAll(stringSet, "yes", "yeah", "sure", "yupp", "okay");.
equalsIgnoreCase you need a workaround to use Set. In this case simply converting every sting to lower case would work, since s1.equalsIgnoreCase(s2) iff s1.toLowerCase().equals(s2.toLowerCase()) (assumning no null objects involved)You need to specify which index in the array to check it against.
All five entries in the array are different, and Java doesn't know which one to check.
You may want to use a for loop to iterate through all the possibilities, and compare each entry to the input.
for (String possibility : yes) if (input.equalsIgnoreCase(possibility)) System.out.println("Compared!");I would use some form of iteration to step through the array one element at a time:
for (String compare : yes){
if ((input).equalsIgnoreCase(compare)) {
System.out.println("compared!");
}}
Or something along these lines after you read in the input.
Assuming values in yes are all lower-case
String[] yes = new String[]{"yes", "yeah", "sure", "yupp", "okay"};
System.out.println("Input");
String input = scan.next();
if (Arrays.asList(yes).contains(input.toLowerCase())) {
System.out.println("compared!");
}
or with lambdas, ignoring case, as suggested by fabian in comments
String[] yes = new String[]{"yes", "yeah", "sure", "yupp", "okay"};
System.out.println("Input");
String input = scan.next();
if (Arrays.stream(yes).anyMatch(input::equalsIgnoreCase)) {
System.out.println("compared!");
}
Arrays.stream(yes).anyMatch(input::equalsIgnoreCase) wouldn't require the yes array to be all lowercase.