《JAVA面向对象程序设计》练习题 - 参考答案

public static void main(String[] args) {

Person c = new Person(\, 17);

System.out.println(c.name + \ + c.age + \);

}

}

2、以下程序的输出结果为__课程号:101 课程名:ASP 学分:3___。 public class Course {

private String cNumber; private String cName; private int cUnit;

public Course(String number, String name, int unit) {

cNumber = number; cName = name; cUnit = unit;

}

public void printCourseInfo() {

System.out.println(\课程号:\ + cNumber + \课程名:\ + cName + \学分:\ +

cUnit);

}

}

class CourseTest {

public static void main(String[] args) {

Course c;

c = new Course(\, \, 3); c.printCourseInfo();

}

}

3、以下程序的输出结果为__汤姆猫体重：20.0斤___。 public class Tom {

private float weight; private static String name;

public void setWeight(float weight) {

this.weight = weight;

}

private void out() {

System.out.println(name + \体重：\ + weight + \斤\);

}

public static void main(String[] args) {

Tom.name = \汤姆猫\;

Tom cat = new Tom();

cat.setWeight(20); cat.out();

}

}

4、以下程序的输出结果__。 public class Father {

String name, address, tel;

int age;

public Father(String name, int age) {

this.name = name;

this.age = age;

}

void out() {

System.out.print(\姓名:\ + name); System.out.print(\年龄:\ + age);

}

void outOther() {

System.out.print(\家庭住址:\ + address); System.out.print(\电话:\ + tel);

}

}

class Son extends Father {

String school;

public Son(String name, int age) {

super(name, age);

}

void out() {