把字符串"3,1,2,4"以","分割拆分为数组，数组元素并按从小到大的顺序排列

package com.wangcf;
/**
 * 把字符串"3,1,2,4"以","分割拆分为数组，数组元素并按从小到大的顺序排列
 * @author fan
 *
 */
public class Test{
    /**
     * 冒泡排序
     * @param s
     * @return
     */
    public int[] paixu(int[] s){
        for (int i=s.length; i >0; i--) {
            int tem;
            for (int j = 0; j < i-1; j++) {
                if(s[j]>s[j+1]){
                    tem=s[j];
                    s[j]=s[j+1];
                    s[j+1]=tem;
                }
            }
        }
        return s;
    }

    public static void main(String[] args) {
        String s=new String("3,1,2,4");
        String a[]=s.split(",");    //以,隔开获得数组a[]={"3","1","2","4"}
        int b[]=new int[a.length];
        for(int i=0;i<a.length;i++){    //将String数组，转换为int数组
            b[i]=Integer.parseInt(a[i]);
        }
        for(int c:b){
            System.out.println(c);
        }

        System.out.println("============================");
        String s1=new String("3124");
        String a1[]=s1.split(",");//由于s1中没有逗号，所以新生成的数组还是a1[]={"3124"}
        System.out.println(a1.length);
        System.out.println("---------------");
        int b1[]=new int[s1.length()];
        for (int i = 0; i < s1.length(); i++) {    //将String数组转换为int数组
            b1[i]=Integer.parseInt(String.valueOf(s1.charAt(i)));
        }
        for(int c1:b1){
            System.out.println(c1);
        }
        System.out.println("+++++++++++++++++++");
        Test t=new Test();
        b=t.paixu(b);
        for(int e:b){
            System.out.println(e);
        }
    }
}