4.字符串连接

public class PrintScore {

    /**
     * 打印成绩单
     *
     */
    public static void main(String[] args) {
        int sqlScore = 80;            //SQL成绩
        int javaScore = 90;           //Java成绩
        double htmlScore = 86.7;      //HTML成绩

        //成绩单
        String scoreSheet = "SQL:" + sqlScore + "  Java:" + javaScore  + "  HTML:" + htmlScore;  

        //打印成绩单
        System.out.println("*****成绩单*****");
        System.out.println(scoreSheet);   

        String bottom = "\n\t\t版权所有：".concat("北大青鸟");
        System.out.println(bottom);

    }

}