数组内容转化为字符串

String s = Arrays.toString(arr);

public staic void main(String[] args){
	int[] arr = {2,34,5,323,645,32,43};
	// 打印数组
	System.out.println(arr);  // [I@2ac1fdc4

	//数组内容转化为字符串
	String s = Arrays.toString(arr);
	System.out.println(s); // [2,34,5,323,645,32,43]
}