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RandomString.java
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RandomString.java
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package net.mst.utilities.randomstring;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import net.mst.utilities.mathematical.Random;
public class RandomString {
private Integer length;
private HashSet<Character> charset;
public RandomString(Integer Length, HashSet<Character> Charset) {
this.length = Length;
this.charset = Charset;
}
public List<String> getOptions() {
List<String> options = new ArrayList<>();
for(Character character : charset) {
options.add(String.valueOf(character));
}
for(int i = 1; i < length; i++) {
options = generateNext(options);
}
return options;
}
private List<String> generateNext(List<String> original) {
List<String> tempList = new ArrayList<String>();
for(String string : original) {
for(Character character : charset) {
tempList.add(string + character);
}
}
return tempList;
}
public long getOptionCount() {
return (long) Math.pow(charset.size(), length);
}
public String generateRandom() {
String tempString = "";
for(int i = 0; i < length; i++) {
tempString = tempString + Random.pickOf(charset);
}
return tempString;
}
}