java字符串的拼接

public class Test{
	public static void main(String[] srgs){
		
		//创建字符串缓冲区对象
		StringBuffer s = new StringBuffer();
		
		String[] ins = {"体育项目","足球","篮球","棒球"};
		
		//利用for循环进行字符串的拼接
		for(int i=0;i<ins.length;i++){
			if(i==ins.length-1){
				s.append(ins[i]);
			}
			if(i==0){
				s.append(ins[i]);
				s.append(":");
			}else{
				s.append(ins[i]);
				s.append(",");
			}
		}
		
		System.out.println(s);
	}
}