两个字符串连接程序

package cskaoyan;
 
public class cskaoyan46 {
 
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        java.util.Scanner in = new java.util.Scanner(System.in);
        System.out.println("输入第一个字符串:");
        String str1 = in.nextLine();
        System.out.println("输入第二个字符串:");
        String str2 = in.nextLine();
        System.out.println(connectString(str1, str2));
        in.close();
    }
 
    private static String connectString(String str1, String str2) {
        // TODO Auto-generated method stub
        StringBuffer buf = new StringBuffer(str1 + str2);
        return buf.toString();
    }
}