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pj9x8ikrt 1 year ago
parent 0b22e9cda9
commit c540dbbbc5
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线程
package step1;
//请在此添加实现代码
/********** Begin **********/
public class ThreadClassOne extends Thread{
public int i=0;
public ThreadClassOne(){
super();
}
public void run(){
for(i=0;i<10;i++){
if(i%2==1)
System.out.print(i+" ");
}
}
}
/********** End **********/
package step3;
import java.util.Scanner;
public class HelloStep3 {
public static void main(String[] args) {
System.out.println("星级成绩评定系统");
System.out.println("请输入成绩：");
Scanner sc = new Scanner(System.in);
/******start******/
int scope = sc.nextInt();
if(scope >=90) {
System.out.print("*****五星成绩");
} else if(scope>=80 && scope<90) {
System.out.print("****四星成绩");
} else if(scope>=70 && scope<80) {
System.out.print("***三星成绩");
} else if(scope>=60 && scope<70) {
System.out.print("**俩星成绩");
} else {
System.out.print("无星成绩");
}
/******end******/
}
}
package step4;
import java.util.Scanner;
public class HelloSwitch {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入月份：");
int input = sc.nextInt(); //获取输入的月份
//通过输入的月份来判断当前季节并输出
/*****start*****/
switch (input) {
case 1:
System.out.println(input+"月是冬天");
break;
case 2:
System.out.println(input+"月是冬天");
break;
case 3:
System.out.println(input+"月是春天");
break;
case 4:
System.out.println(input+"月是春天");
break;
case 5:
System.out.println(input+"月是春天");
break;
case 6:
System.out.println(input+"月是夏天");
break;
case 7:
System.out.println(input+"月是夏天");
break;
case 8:
System.out.println(input+"月是夏天");
break;
case 9:
System.out.println(input+"月是秋天");
break;
case 10:
System.out.println(input+"月是秋天");
break;
case 11:
System.out.println(input+"月是秋天");
break;
case 12:
System.out.println(input+"月是冬天");
break;
}
/*****end*****/
}
}
package step3;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Task {
public void task() throws IOException{
/********* Begin *********/
String file1 = "src/step3/input/input.txt";
FileReader fr = new FileReader(file1);
char[] cbuf = new char[8];
fr.read(cbuf);
String file2 = "src/step3/output/output.txt";
FileWriter fw = new FileWriter(file2);
fw.write(cbuf);
fr.close();
fw.flush();
fw.close();
/********* End *********/
}
}
package step4;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Task {
public void task() throws IOException{
/********* Begin *********/
FileReader fr = new FileReader("src/step4/input/input.txt");
FileWriter fw = new FileWriter("src/step4/output/output.txt");
int len = 0;
char[] cbuf = new char[1024];
while ((len = fr.read(cbuf))!=-1)
{
fw.write(cbuf,0,len);
}
fr.close();
fw.flush();
fw.close();
FileInputStream fs = new FileInputStream("src/step4/input/input.jpg");
FileOutputStream fos = new FileOutputStream("src/step4/output/output.jpg");
int le = 0;
byte[] bt = new byte[1024];
while ((le = fs.read(bt))!=-1)
{
fos.write (bt,0,le);
}
fs.close();
fos.flush();
fos.close();
/********* End *********/
}
}
package case1;
public class TestPersonDemo {
public static void main(String[] args) {
/********* begin *********/
// 声明并实例化一Person对象p
Person p = new Person();
// 给p中的属性赋值
p.setName("张三");
p.setAge(18);
// 调用Person类中的talk()方法
p.talk();
/********* end *********/
}
}
// 在这里定义Person类
class Person {
/********* begin *********/
private String name;
private int age;
public String getNmae(){
return name;
}
public void setName(String name){
this.name = name;
}
public int getAge(){
return age;
}
public void setAge(int age){
this.age = age;
}
public void talk(){
System.out.println("我是："+name+"，今年："+age+"岁");
}
/********* end *********/
}
package case2;
public class extendsTest {
public static void main(String args[]) {
// 实例化一个Cat对象，设置属性name和age，调用voice()和eat()方法，再打印出名字和年龄信息
/********* begin *********/
Cat cat = new Cat();
cat.name = "大花猫";
cat.age = "6岁";
cat.voice();
cat.eat();
System.out.println(cat.name+cat.age);
/********* end *********/
// 实例化一个Dog对象，设置属性name和age，调用voice()和eat()方法，再打印出名字和年龄信息
/********* begin *********/
Dog dog = new Dog();
dog.name = "大黑狗";
dog.age = "8岁";
dog.voice();
dog.eat();
System.out.println(dog.name+dog.age);
/********* end *********/
}
}
class Animal {
/********* begin *********/
String name;
String age;
/********* end *********/
}
class Cat extends Animal {
// 定义Cat类的voice()和eat()方法
/********* begin *********/
public void voice(){
System.out.println(name+"喵喵叫");
}
public void eat(){
System.out.println(name+"吃鱼");
}
/********* end *********/
}
class Dog extends Animal {
// 定义Dog类的voice()和eat()方法
/********* begin *********/
public void voice(){
System.out.println(name+"汪汪叫");
}
public void eat(){
System.out.println(name+"吃骨头");
}
/********* end *********/
}
package case7;
public class interfaceTest {
public static void main(String[] args) {
// 实例化一Student的对象s，并调用talk()方法，打印信息
/********* begin *********/
Student s = new Student();
s.talk();
/********* end *********/
}
}
// 声明一个Person接口，并在里面声明三个常量：name、age和occupation，并分别赋值，声明一抽象方法talk()
interface Person {
/********* begin *********/
String name = "张三";
int age = 18;
String occupation = "学生";
public abstract void talk();
/********* end *********/
}
// Student类继承自Person类 复写talk()方法返回姓名、年龄和职业信息
class Student implements Person {
/********* begin *********/
public void talk() {
System.out.println("学生——>姓名："+name+"，年龄："+age+"，职业："+occupation+"！");
}
/********* end *********/
}
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