package chapter2; public class Example09 { public static void main(String[] args) { int grade = 75; if (grade > 80) { System.out.println("该成绩的等级为优"); } else if (grade > 70) { System.out.println("该成绩的等级是良"); } else if (grade > 60) { System.out.println("该成绩的等级是中"); } else { System.out.println("该成绩的等级是差"); } } }