package test3; //0.03mm對折超過8848.13m

public class Duizhe {

????public static void main(String[] args) {

????????double houdu = 0.08;

????????int cishu = 0;

????????while (houdu<=8848130){

????????????houdu=houdu*2;

????????????cishu++;

????????}

????????System.out.println("需要對折："+cishu+"次");

????}

}

package test3; //java作業(yè) c語言作業(yè)

public interface Demo{

????void javazy();

????void czy();

}

public class Jk implements Demo {

????@Override

????public void javazy(){

????????//TODO Auto-generated method stub

????????System.out.println("java作業(yè)完成");

}

@Override

public void czy(){

????????//TODO Auto-generated method stub

????????System.out.println("c語言作業(yè)完成");

}

public static void main(String[] args){

????????Jk jk = new Jk();

????????jk.javazy();

????????jk.czy();

????}

}

package test3; //定義集合儲存五個學(xué)生名字

import java.util.Scanner; //控制臺輸入名字

public class Jihe {? ?//判斷是否在集合內(nèi)

?public static void main(String[] args) {

? Scanner scanner = new Scanner(System.in);

? String arrayl[] = new String[5];

? for(int i = 0; i < arrayl.length; i++) {

? ?System.out.println("請輸入第"+(i +1)+"位學(xué)生的姓名");

? ?arrayl[i] = scanner.next();

? }

? System.out.println("輸入學(xué)生的姓名如下: ") ;

? for(String a : arrayl) {

? System.out.println(a);

? }

? System.out.println("請輸入要查詢的學(xué)生姓名:");

? String find = scanner.next();

? int position = -1;

? for(int i = 0;i < arrayl.length; i++) {

? ?if(find.equals(arrayl[i])) {

? ? position = i;

? ? System.out.println(find + "的索引位置是" + position);

? ?}

? }

? if(position == -1){

? ?System.out.println("未找到");

? }

?}

}

package test3; //計算1-100除了50之外的累計和

public class Leijia {

????public static int leijia(int y)

????{

????????int sum = 0;

????????for (int j=1;j<101;j++){

????????????if(j==50){

????????????????continue;

????????????}

????????????else{

????????????????sum+=j;

????????????}

????????}

????????return sum;

????}

????public static void main(String[] args) {

????????int y=0;

????????int sum=leijia(y);

????????System.out.println(sum);

????}

}

package test3; //根據(jù)身份證分辨男女

import java.util.Scanner;

public class Demo3 {

????public static void main(String[] args) {

???????? System.out.println("請輸入18位身份證號碼：");

???????? Scanner scanner? = new Scanner(System.in);

???????? String number = scanner.next();

???????? String sex;

???????? int n = number.charAt(16);

???????? int year,month,day;

???????????? if (n%2==0){

???????????? sex = "女";

???????????? }else{

????????????????sex = "男";

?????????????}

????????????System.out.println("性別為："+sex);

????}

}

package test3;? //輸入字符串，判斷數(shù)字出現(xiàn)次數(shù)

import java.util.Scanner;

public class Zfc {

????public static void main(String[] args) {

???????? Scanner scanner = new Scanner(System.in);

???????? int b = 0;

???????? String a= scanner.next ();

???????? char[] ch = a.toCharArray();

???????? for(char c: ch ){

????????????if (c>48 && c<57){

????????????????b=b+1;

????????????}

????????????System.out.println(b);

????????}

????}

}

package test3; //數(shù)組存儲12個成績并算出平均數(shù)

public class Pingjun {

????public static void main(String[] args) {

???????? int[] a = {72,89,65,87,91,53,82,71,93,76,68};

???????? int sum = 0;

???????? for (int i = 0; i < a.length; i++){

????????????sum+=a[i];

????????}

???????? int x = 0;

???????? x = sum /a.length;

???????? System.out.println("平均數(shù)："+x);

????}

}

package test3;

public class Car {

???? private String brand;

???? private double longs;

???? private String color;

???? private double price;

???? public String getBrand() {

???????? return brand;

???? }

???? public void setBrand(String brand) {

???????? this.brand = brand;

???? }

???? public double getLongs() {

???????? return longs;

???? }

???? public void setLongs(double longs) {

???????? this.longs = longs;

???? }

???? public String getColor() {

???????? return color;

???? }

???? public void setColor(String color) {

???????? this.color = color;

???? }

???? public double getPrice() {

???????? return price;

???? }

???? public void setPrice(double price) {

???????? this.price = price;

???? }

???? public Car(String brand,double longs,String color,double price){

???? super();

???????? this.brand = brand;

???????? this.longs = longs;

???????? this.color = color;

???????? this.price = price;

???? }

???? public? Car() {

???? ???? super();

???? }

???? public void run() {

???? }

???? public static void main(String[] args) {

???????? Car car1 = new Car("捷達",5.3,"紅色",8.9);

???????? Car car2 = new Car("寶馬",5.8,"黑色",35.5);

???????? Car car3 = new Car("捷達",5.3,"紅色",11.5);

???????? Car car4 = new Car("捷達",5.3,"紅色",11.5);

???????? Car car5 = new Car("捷達",5.3,"紅色",11.5);

????}

}??