Filtering string in java

Question

It's not about filtering bad words so get in. Imagine that you have list of strings named as abcd,abcde,abcdef,abfg,abdc if a user gives string abc as filter in ConsoleProgram abcd,abcde and abcdef will be printed out. I thought about using substring but I couldn't achieved it does anybody have any idea .. note that I am new to java and not competent thanks!

Solution 1

The first thing you need is learn about String Regex, maybe here: http://docs.oracle.com/javase/tutorial/essential/regex/. Try out the next simply code.

public class StringMatcher {

    public static void main(String[] args) {
        String[] words = new String[]{"abcd", "abcde", "abcdef", "abfg", "abdc"};
        String filter = "abc";

        for (String word : words) {
            if (word.matches(filter + "(.*)")) {
                System.out.println("This pass the filter: " + word);
            }
        }
    }
}

Solution 2

Let's say your Strings are in an ArrayList called wordBank.

for(String i : wordBank) { //loops through the array with 'i' being current index
    if(i.contains("abc")) { //checks if index contains filter String
        System.out.println(i); //prints out index if filter String is present
    }
}

Solution 3

Try this: If the item in list contains the string inputted by user it will get printed.

input = "abc";
for(int i = 0 ; i < list.size(); i++){
  if (list.get(i).contains(input))
    System.out.println(list.get(i));
}