字符串转成int数组

package lianxi;

import java.awt.image.ConvolveOp;

public class ZhengshuShuzu {
    public static void main(String[] args) {
        String str="1,3,5,7,9";
        char []cha=new char[9];
        int []arr=new int[5];
        cha=str.toCharArray();
        int j=0;
        System.out.println(cha);
        for(int i=0;i<str.length();i++){
            char ch=cha[i];
            if(ch!=','){
            arr[j]=Integer.parseInt(String.valueOf(ch));                    ;
            System.out.print(arr[j]);
            j++;
            }
        }        
    }
}