学步园

数组转为字符串：并以逗号分割

package stringDemo;

import StaticDemo.thisDemo;


public class StringBuffer {
	
	public static void main(String[] args){
	   
		int[] arr={2,4,6,8,9,12,890,234,15};
		String str=arrayToString(arr);
		System.err.println(str);
	}
	
	public static String arrayToString(int[] arr){
		StringBuilder sb=new StringBuilder();
		sb.append("[");
		for (int i = 0; i < arr.length; i++) {
			if(i!=arr.length-1){
				sb.append(arr[i]+",");
			}
			else {
				sb.append(arr[i]+"]");
			}
		}
		return sb.toString();
		
	}

}