java去除字符串中重復、不重復、消除重復後字符
阿新 • • 發佈:2018-12-13
rar pre har mov dal imp stat pub move java去除字符串中重復、不重復、消除重復後字符
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] args) { String str = "aaasd"; System.out.println("原字符串: "+str); Set<Character> set1 = new HashSet<Character>(); Set<Character> set2 = new HashSet<Character>(); Set<Character> set3 = new HashSet<Character>(); //把字符串轉為字符數組 char[] cs = str.toCharArray(); //便利字符數組aaasd for(char c:cs){ //把遍歷的字符加入set1(HashSet,無序不可重復) boolean b = set1.add(c);//asd if(!b){ //b不等空就是有重復的字符,重復的字符加入set2 set2.add(c);//a } } //把消除重復後的字符set1賦給Set3 set3.addAll(set1);//asd //把消除的重復後的字符set1 - 重復的字符set2 = 不重復的字符 set3.removeAll(set2);//asd-a = sd System.out.println("=========消除重復厚的字符========="); for ( char c : set1){ System.out.print(c + ""); } System.out.println("\n===========重復的字符==============="); for (char c :set2){ System.out.print(c + ""); } System.out.println("\n========不重復的數組==========="); for (char c :set3){ System.out.print(c + ""); } }
}
java去除字符串中重復、不重復、消除重復後字符