Java总练习.docx

第一题：1、定义类Test1，在类中定义以下方法：定义方法isEven(int num)判断是否是偶数，返回类型为布尔类型。在main方法中输入一个整数，调用isEven方法，如果是偶数，输出“偶数，能被2整除”，否则输出“奇数，不能被2整除” 2、定义类Test2，在类中定义以下方法：定义方法max(int x,int y)，求两个数的最大值。在main方法中输入三个数，调用max方法，输出三个数的最大值。2.1.package ct1;import java.util.Scanner;public class Test1 public boolean isEven(int num)if(num%2=0)return true;elsereturn false;public static void main(String args) Scanner input = new Scanner(System.in);System.out.println(请输入一个整数：);int num = input.nextInt();Test1 test = new Test1();if(test.isEven(num)System.out.println(是偶数);elseSystem.out.println(是奇数);2.package ct1;import java.util.Scanner;public class Test2 public int max(int x,int y)if(xy)return x;elsereturn y;public static void main(String args) int four;Scanner input=new Scanner(System.in);System.out.print(请输入三个整数：);int one=input.nextInt();int two=input.nextInt();int three=input.nextInt();Test2 test=new Test2();four=test.max(one, two);System.out.println(test.max(three, four);第二题：1、从键盘接收10个整数，统计正数的个数和负数的个数（用数组做）2、计算100以内奇数之和。2.1.package ct2;import java.util.Scanner;public class Test3 public static void main(String args) int num1 = new int10;int c1=0,c2=0;for(int i=1;i0) c1+;else c2+;System.out.println(正数的个数为+c1);System.out.println(负数的个数为+c2);2. package ct2;public class Test4 public static void main(String args) int sum=0;for(int i=0;i50)System.out.println(您的年龄已经超过50岁，不能当厨师); = name;this.age = age;this.phone = phone;this.food = food;public Cook() super();/ TODO Auto-generated constructor stub厨师测试类：package ct3;public class CookTest public void AdjustAge(Cook a)a.setAge(a.getAge()+1);a.shuchu();private void makefood() / TODO Auto-generated method stubSystem.out.println(做的菜是：);public static void main(String args) / TODO Auto-generated method stubCookTest c = new CookTest();c.AdjustAge(new Cook(王力,55,123456,湘菜);c.makefood();第四题：1、定义汽车（Mobile）类，具有属性name，具有行为：行驶（run）、刹车（stop）汽车包括：卡车（Truck）和轿车（Car）这些汽车行驶的行为各不相同（卡车烧柴油，轿车烧汽油），进行方法覆盖，刹车行为一致，不需要覆盖。2、根据实验三中定义的矩形类，定义子类RoundRectangle定义属性radius表示圆角半径，定义带三个参数的构造方法，参数分别是height，width和radius，调用父类Rectangle中带参数的构造方法实现。1. 父类：package ct4;public class Mobile private String name;public Mobile(String name) super(); = name;public Mobile() super();/ TODO Auto-generated constructor stubpublic void run()System.out.println(行驶);public void stop()System.out.println(刹车);子类：package ct4;public class Truck extends Mobile public Truck() super();/ TODO Auto-generated constructor stubpublic Truck(String name) super(name);/ TODO Auto-generated constructor stubpublic void run()System.out.println(卡车烧柴油);package ct4;public class Car extends Mobile public Car() super();/ TODO Auto-generated constructor stubpublic Car(String name) super(name);/ TODO Auto-generated constructor stubpublic void run()System.out.println(轿车烧汽油);测试类：package ct4;public class MobileTest public static void main(String args) / TODO Auto-generated method stubTruck t = new Truck();t.run();t.stop();System.out.println(n);Car c = new Car();c.run();c.stop();2. package ct66;public class Rectangle double height;double width;public double getHeight() return height;public void setHeight(double height) this.height = height;public double getWidth() return width;public void setWidth(double width) this.width = width;public Rectangle(double height, double width) super();this.height = height;this.width = width;public Rectangle() super();/ TODO Auto-generated constructor stubpublic double getArea()return height*width;public void show()System.out.println(矩形的长为：+height);System.out.println(矩形的宽为：+width);System.out.println(矩形的面积为：+getArea();package ct66;public class RoundRectangle extends Rectangleprivate double radius;public RoundRectangle(double height,double width,double radius)super(height,width);this.radius=radius;第五题：1、交通工具（Transportation）分为：汽车（Mobile）、飞机（Plain），各种交通工具的运输（transport）方法各不相同，编写一个测试类TransportationTest，要求如下。编写方法testTransport，对各种交通工具进行运输测试。要依据交通工具的不同，进行相应的运输。2、利用接口实现（1）的功能。1. package ct5;public class Transportation private String transportationName;public String getTransportationName() return transportationName;public void setTransportationName(String transportationName) this.transportationName = transportationName;public Transportation() super();/ TODO Auto-generated constructor stubpublic Transportation(String transportationName) super();this.transportationName = transportationName;public void Transport()System.out.println(transportationName+正在行驶);package ct5;public class Mobile extends Transportationpublic Mobile (String MobileName)super(MobileName);public void Transport()System.out.println(super.getTransportationName()+在陆地上运输);package ct5;public class Plain extends Transportationpublic Plain (String PlainName)super(PlainName);public void Transport()System.out.println(super.getTransportationName()+在空中运输);package ct5;public class TransportationTest public void testTransportation( Transportation t)t.Transport();public static void main(String args) / TODO Auto-generated method stubTransportationTest test = new TransportationTest();test.testTransportation(new Mobile(汽车);test.testTransportation(new Mobile(飞机);2. package ct55;public interface ITransportation public void transport();package ct55;public class Mobile implements ITransportation private String name;public Mobile(String name) super(); = name;Overridepublic void transport() / TODO Auto-generated method stubSystem.out.println(name+在陆地上运输);package ct55;public class Plain implements ITransportationprivate String name;public Plain(String name) super(); = name;Overridepublic void transport() / TODO Auto-generated method stubSystem.out.println(name+在空中运输);package ct55;public class TestTransport public void testTransport(ITransportation I1)I1.transport();public static void main(String args) / TODO Auto-generated method stubTestTransport T2=new TestTransport();T2.testTransport(new Mobile(汽车);T2.testTransport(new Plain(飞机);第六题：1、判断字符数组中的字符是否是字母、数字