問題描述

public void evaluateCourse() {//Res res = new Res();//Connection con = null;String total = '1,2,33,53';for(int i = 0;i < total.length() ; i ++){ if(total.charAt(i) != ’,’){System.out.println(total.charAt(i)); }} }

輸出結果是

我想要的結果是： 1

2 33 53

問題解答

先不管用不用String.split()

public void evaluateCourse() {//Res res = new Res();//Connection con = null;String total = '1,2,33,53';String temp = '';for(int i = 0;i < total.length() ; i ++){ temp += total.charAt(i); if(total.charAt(i) == ’,’){System.out.println(temp);temp = ''; }} }

再看看用split的

public void evaluateCourse() {//Res res = new Res();//Connection con = null;String total = '1,2,33,53';String[] temp = aa.split(',');for(String s : temp) { System.out.println(s);} }回答2：

為什么不用String.split()？

Stream.of(total.split(',')).forEach(System.out::println);