1. 通过键盘输入任意一个字符串序列，字符串可能包含多个子串，子串以空格
分隔。请编写一个程序，自动分离出各个子串，并使用 ’,’ 将其分隔，并且在最后
也补充一个 ’,’ 并将子串存储
测试：输入：
“abc def gh i d”
输出：
“abc,def,gh,i,d,”
第一种方法:
import java.util.Scanner;public class Main1 {public static void main(String[] args) {Scanner scan = new Scanner(System.in);// receive the input string.String inputStr = scan.nextLine();// split the string to array.String[] strArray = inputStr.split(" ");// add ","StringBuffer newSb = new StringBuffer();for(String str: strArray) {newSb.append(str);newSb.append(",");}// print output string.System.out.println(newSb.toString());}}
第二种使用string 的replace
import java.util.Scanner;public class Main2 {public static void main(String[] args) {Scanner scan = new Scanner(System.in);// receive the input string.String inputStr = scan.nextLine();// replace " " by ","String newStr = inputStr.replace(" ", ",");// add "," in the end.newStr = newStr.concat(",");// print output string.System.out.println(newStr);}}
