public class Student { public void study() { System.out.println("同学真好学!"); } public void study(String name) { System.out.println(name + "同学真好学!"); } public void study(String name, int age) { System.out.println(name + "同学真好学!" + "他今年" + age + "岁了"); } public static void main(String[] args) { // 实例化学生对象 Student student = new Student(); // 调用无参数方法 student.study(); // 调用单参数方法 student.study("Colorful"); // 调用双参数方法 student.study("小慕", 20); } }