题目要求

将字符串数组里的数字读出 如string a[ ]={4,48,52,69}变成int a[]= {4,48,52,69,}

代码展示：

package test; import java.util.ArrayList; public class Test { public static void main(String[] args) { //测试 仿String.split 功能 String a = "8,10,21,30"; String temp = ""; ArrayList b = new ArrayList(); for (int i = 0; i < a.length() ; ++i) { if (a.charAt(i) == ',') { b.add(Integer.parseInt(temp)); temp = ""; } else { temp += a.charAt(i); } } if (temp.length() > 0) { b.add(Integer.parseInt(temp)); temp = ""; } int[] res = new int[b.size()]; for (int i = 0 ;i <res.length ; ++i) { res[i] =(int)b.get(i); System.out.printf(res[i] + " "); } } }

或

import java.io.*; public class Appmain { public static void main(String args[]) throws IOException { String S=new String("8,48,19,36"); int []a=new int[4]; int j=0; int flag=1; String S1; for(int i=0;i<S.length() && flag !=-1;i=0) { flag=S.indexOf(','); if(flag !=-1) { S1=S.substring(0,flag); } else { S1=S; } for(int k=0;k<S1.length();k++) { char c=S1.charAt(k); a[j]=a[j]*10+c-'0'; } j++; S=S.substring(flag+1,S.length()); } System.out.println("数组中的元素是："); for(int i=0;i<4;i++) { System.out.println(a[i]); } } }