Number
package day_05.Number;
public class Number {
private int num1;
private int num2;
public Number() {
}
public Number(int num1, int num2) {
this.num1 = num1;
this.num2 = num2;
}
public int add(){
return num1+num2;
}
public int sub(){
return num1-num2;
}
public int multi(){
return num1*num2;
}
public int div(){
return num1/num2;
}
public int getNum1() {
return num1;
}
public int getNum2() {
return num2;
}
public void setNum1(int num1) {
this.num1 = num1;
}
public void setNum2(int num2) {
this.num2 = num2;
}
public String toStirng(){
return "Number [num1=" + num1 + ", num2=" + num2 + "]";
}
}
NumberMain
package day_05.Number;
import day_05.Number.Number;
public class NumberMainTest {
public static void main(String[] args) {
Number number=new Number(3,6);
System.out.println(number.add());
number.setNum1(40);
number.setNum2(20);
System.out.println(number.div());
}
}
Person
package day_05.PerStuTea;
public class Person {
protected int id;
protected String name;
protected int age;
public Person() {
}
public Person(int id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
protected void show(){
System.out.println("这是一个人!");
}
}
Student
package day_05.PerStuTea;
import day_05.PerStuTea.Person;
public class Student extends Person {
int id;
String name;
int age;
String className;
public Student() {
}
public Student(int id, String name, int age, String className) {
this.id = id;
this.name = name;
this.age = age;
this.className = className;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
if (age >0&&age<120){
this.age = age;
}
}
public void setClassName(String className) {
this.className = className;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getClassName() {
return className;
}
public void study(){
System.out.println(className+"班的"+name+"正在学习!");
}
public String toStirng(){
return "Student [id="+id+",name="+name+",age="+age+",className="+className+"]";
}
}
PerStuMain
package day_05.PerStuTea;
public class mainPerStuTea {
public static void main(String[] args) {
Teacher teacher=new Teacher();
Student student=new Student();
teacher.show();
teacher.teach();
student.show();
student.study();
}
}
StudentManger改进版
package day_05.PerStuTea;
import day_04.Student;
import java.util.Scanner;
public class StudentManager {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入学生个数:");
int count = scanner.nextInt();
Student[] students = new Student[count];
for (int i = 0; i < students.length; i++) {
System.out.println("请输入学生id:");
int id = scanner.nextInt();
System.out.println("请输入学生name:");
String name = scanner.next();
System.out.println("请输入学生age:");
int age = scanner.nextInt();
System.out.println("请输入学生班级:");
String className = scanner.next();
Student student = new Student(id, name, age, className);
students[i] = student;
}
System.out.println("学生信息列表:");
for (int i = 0; i < students.length; i++) {
Student student = students[i];
System.out.println(student);
}
while (true) {
System.out.println("----------------------------");
System.out.println("根据id查找: 1");
System.out.println("根据name查找: 2");
System.out.println("根据age查找: 3");
System.out.println("根据className查找: 4");
System.out.println("退出程序: 0");
System.out.println("----------------------------");
int type = scanner.nextInt();
if (type == 0) {
System.out.println("退出程序.");
return;
}
switch (type) {
case 1:
System.out.println("id");
System.out.println("输入要查找的id:");
int id = scanner.nextInt();
boolean isSearchByIdFind = false;
for (int i = 0; i < students.length; i++) {
Student student = students[i];
if (id == student.getId()) {
System.out.println(student);
isSearchByIdFind = true;
}
}
if (!isSearchByIdFind) {
System.out.println("没有该学生信息.");
}
break;
case 2:
System.out.println("name");
System.out.println("输入要查找的name:");
String name = scanner.next();
boolean isSearchByNameFind = false;
for (int i = 0; i < students.length; i++) {
Student student = students[i];
if (name.equals(student.getName())) {
System.out.println(student);
isSearchByNameFind = true;
}
}
if (!isSearchByNameFind) {
System.out.println("没有该学生信息.");
return;
}
break;
case 3:
System.out.println("age");
System.out.println("请输入学生年龄：");
int age = scanner.nextInt();
boolean isSearchByAgeFind = false;
for (int i = 0; i < students.length; i++) {
Student student = students[i];
if (age == student.getAge()) {
System.out.println(student);
isSearchByAgeFind = true;
}
}
if (!isSearchByAgeFind) {
System.out.println("没有该学生信息");
}
break;
case 4:
System.out.println("className");
System.out.println("请输入学生班级：");
String className = scanner.next();
boolean isSearchByClassNameFind = false;
for (int i = 0; i < students.length; i++) {
Student student = students[i];
if (className.equals(student.getClassName())) {
System.out.println(student);
isSearchByClassNameFind = true;
}
}
if (!isSearchByClassNameFind) {
System.out.println("没有该学生信息");
}
break;
default:
break;
}
}
}
public static void searchById(Student[] students, int id) {
boolean isSearchByIdFind = false;
for (int i = 0; i < students.length; i++) {
Student student = students[i];
if (id == student.getId()) {
System.out.println(student);
isSearchByIdFind = true;
}
}
if (isSearchByIdFind == false) {
System.out.println("没有该学生信息");
}
}
private static void printStudents(Student[] students) {
System.out.println("学生列表信息：");
for (int i = 0; i < students.length; i++) {
Student student = students[i];
System.out.println(student);
}
}
private static void inputStudents(Student[] students) {
Scanner scanner = new Scanner(System.in);
for (int i = 0; i < students.length; i++) {
System.out.println("请输入学生的id：");
int id = scanner.nextInt();
System.out.println("请输入学生的名字：");
String name = scanner.next();
System.out.println("请输入学生的年龄：");
int age = scanner.nextInt();
System.out.println("请输入学生班级：");
String className = scanner.next();
Student student = new Student(id, name, age, className);
students[i] = student;
}
}
}
Point
package day_05.Point;
public class Point {
private int x;
private int y;
public Point() {
}
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public void movePoint(int dx, int dy) {
this.x += dx;
this.y += dy;
}
public void setX(int x) {
this.x = x;
}
public void setY(int y) {
this.y = y;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
}
PointMain
package day_05.Point;
import day_05.Point.Point;
public class PointMainTest {
public static void main(String[] args) {
Point point=new Point(1,1);
System.out.println("("+point.getX()+","+point.getY()+")");
point.movePoint(2,3);
System.out.println("("+point.getX()+","+point.getY()+")");
}
}
Rectangle
package day_05.Rectangle;
public class Rectangle {
private int width;
private int height;
public Rectangle() {
this.width=1;
this.height=1;
}
public Rectangle(int width) {
this.width = width;
this.height=width;
}
public Rectangle(int width, int height) {
this.width = width;
this.height = height;
}
public int zhouchang(){
return 2*(width+height);
}
public int mianji(){
return width*height;
}
public int getWidth() {
return width;
}
public int getHeight() {
return height;
}
public void setWidth(int width) {
this.width = width;
}
public void setHeight(int height) {
this.height = height;
}
@Override
public String toString(){
return "Rect [width=" + width + ", height=" + height + "]";
}
}
RectangleMain
package day_05.Rectangle;
import day_05.Rectangle.Rectangle;
public class RectangleMainTest {
public static void main(String[] args) {
Rectangle rectangle=new Rectangle(4);
System.out.println(rectangle.zhouchang());
System.out.println(rectangle.mianji());
System.out.println(rectangle.toString());
}
}
Vehicle
package day_05.Vehicle;
public class Vehicle {
private double speed;
private double size;
public Vehicle() {
}
public Vehicle(double speed, double size) {
this.speed = speed;
this.size = size;
}
public void move(){
System.out.println("speed:"+speed);
}
public void speedUp(double up){
speed+=up;
}
public void speedDown(double down){
speed-=down;
}
public double getSpeed() {
return speed;
}
public double getSize() {
return size;
}
public void setSpeed(double speed) {
this.speed = speed;
}
public void setSize(double size) {
this.size = size;
}
public String show(){
return "Vehicle[speed=]"+speed+",size="+size+"]";
}
}
VehicleMain
package day_05.Vehicle;
public class VehicleMainTest {
public static void main(String[] args) {
Vehicle vehicle=new Vehicle();
vehicle.setSize(10);
vehicle.setSpeed(100);
System.out.println(vehicle.getSpeed());
vehicle.speedUp(10);
System.out.println(vehicle.getSpeed());
}
}
Processed:
0.010, SQL:
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