「JAVA买鱼」java怎么买
今天给各位分享JAVA买鱼的知识，其中也会对java怎么买进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
- 1、java中假设有人拿100块去买鱼 大鱼五块每条中鱼三块每条小鱼一元五条编程输出
- 2、Java渔夫打渔问题
- 3、使用JAVA 编写一个程序，显示5中商品价格，用户可以选择多种商品并在其后的文本框输入购买的数量。
- 4、用Java程序完成以下场景(用继承多态)：有一个主人（Master类），他养了两只宠物（Pet类）
- 5、捕鱼的JAVA问题，大师们指导指导呗。。。
java中假设有人拿100块去买鱼 大鱼五块每条中鱼三块每条小鱼一元五条编程输出
public static void main(String[] args) {
int a;//大鱼的数量
int b;//中鱼的数量
int c;//小鱼的数量
for(int i = 0;i=20;i++){
a=i;
for(int j = 0;j=33;j++){
b=j;
for(int k = 0;k=500;k++){
c=k;
if(a*5+b*3+c*0.2==100){
System.out.print("大鱼："+a+"\t");
System.out.print("中鱼："+b+"\t");
System.out.println("小鱼："+c+"\t");
}
}
}
}
}
Java渔夫打渔问题
public class Fishman {
public static void main(String[] args) {
calcFish();
}
private static void calcFish() {
int total = 8;//至少有8条=邻居的海伦3条+又吃了一条 + 剩下4条
int left = 0;
do {
int sold = total / 2;//第一次卖掉一般剩下的
int firstLeft = sold - 3;//送掉邻居海伦剩下的
if(firstLeft % 3 == 0){
left = firstLeft/3 - 1;// 三分之一里面-吃掉的一条
if(left == 4 ){
System.out.println("total: " + total + " fish");
}
}
total += 2;//刚开始能平均2份，因此鱼数必定是偶数，步长为2
} while (left != 4);
}
}
一共36条
使用JAVA 编写一个程序，显示5中商品价格，用户可以选择多种商品并在其后的文本框输入购买的数量。
用java Swing做的？给你个代码，还有运行结果图
package my.test.main;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
import javax.swing.event.CaretEvent;
import javax.swing.event.CaretListener;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class Purchase extends JFrame {
private JPanel contentPane;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
private JTextField textField_4;
private JLabel label_9;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Purchase frame = new Purchase();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public Purchase() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel label = new JLabel("\u5546\u54C11");
label.setBounds(56, 40, 54, 15);
contentPane.add(label);
JLabel label_1 = new JLabel("\u5546\u54C12");
label_1.setBounds(56, 70, 54, 15);
contentPane.add(label_1);
JLabel label_2 = new JLabel("\u5546\u54C13");
label_2.setBounds(56, 100, 54, 15);
contentPane.add(label_2);
JLabel label_3 = new JLabel("\u5546\u54C14");
label_3.setBounds(56, 130, 54, 15);
contentPane.add(label_3);
JLabel label_4 = new JLabel("\u5546\u54C15");
label_4.setBounds(56, 160, 54, 15);
contentPane.add(label_4);
JLabel label_5 = new JLabel("\u5546\u54C1\u540D\u79F0");
label_5.setBounds(56, 7, 54, 15);
contentPane.add(label_5);
JLabel label_6 = new JLabel("单价");
label_6.setBounds(179, 7, 54, 15);
contentPane.add(label_6);
JLabel label_7 = new JLabel("数量");
label_7.setBounds(307, 7, 54, 15);
contentPane.add(label_7);
JLabel label_8 = new JLabel("总价");
label_8.setBounds(145, 224, 54, 15);
contentPane.add(label_8);
label_9 = new JLabel("0");
label_9.setBounds(209, 224, 54, 15);
contentPane.add(label_9);
JLabel label_10 = new JLabel("10");
label_10.setBounds(185, 40, 54, 15);
contentPane.add(label_10);
JLabel label_11 = new JLabel("20");
label_11.setBounds(185, 70, 54, 15);
contentPane.add(label_11);
JLabel label_12 = new JLabel("30");
label_12.setBounds(185, 100, 54, 15);
contentPane.add(label_12);
JLabel label_13 = new JLabel("40");
label_13.setBounds(185, 130, 54, 15);
contentPane.add(label_13);
JLabel label_14 = new JLabel("50");
label_14.setBounds(185, 160, 54, 15);
contentPane.add(label_14);
textField = new JTextField();
textField.setBounds(295, 37, 66, 21);
contentPane.add(textField);
textField.setColumns(10);
textField.addKeyListener(new CalcTotle());
textField_1 = new JTextField();
textField_1.setColumns(10);
textField_1.setBounds(295, 67, 66, 21);
contentPane.add(textField_1);
textField_1.addKeyListener(new CalcTotle());
textField_2 = new JTextField();
textField_2.setColumns(10);
textField_2.setBounds(295, 97, 66, 21);
contentPane.add(textField_2);
textField_2.addKeyListener(new CalcTotle());
textField_3 = new JTextField();
textField_3.setColumns(10);
textField_3.setBounds(295, 127, 66, 21);
contentPane.add(textField_3);
textField_3.addKeyListener(new CalcTotle());
textField_4 = new JTextField();
textField_4.setColumns(10);
textField_4.setBounds(295, 157, 66, 21);
contentPane.add(textField_4);
textField_4.addKeyListener(new CalcTotle());
}
class CalcTotle extends KeyAdapter {
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
int count1, count2, count3, count4, count5;
if (!textField.getText().isEmpty()) {
count1 = Integer.parseInt(textField.getText()) * 10;
} else {
count1 = 0;
}
if (!textField_1.getText().isEmpty()) {
count2 = Integer.parseInt(textField_1.getText()) * 20;
} else {
count2 = 0;
}
if (!textField_2.getText().isEmpty()) {
count3 = Integer.parseInt(textField_2.getText()) * 30;
} else {
count3 = 0;
}
if (!textField_3.getText().isEmpty()) {
count4 = Integer.parseInt(textField_3.getText()) * 40;
} else {
count4 = 0;
}
if (!textField_4.getText().isEmpty()) {
count5 = Integer.parseInt(textField_4.getText()) * 50;
} else {
count5 = 0;
}
final int totle = count1 + count2 + count3 + count4 + count5;
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
label_9.setText(totle + "");
}
});
}
}
}
用Java程序完成以下场景(用继承多态)：有一个主人（Master类），他养了两只宠物（Pet类）
public class Run {
public static void main(String[] args) {
Master master = new Master();
master.feedDog("鸡骨头");
master.feedCat("鸡骨头");
}
}
class Master {
private Pet mPet;
private Food mFood;
public void feedCat(String food) {
mPet = new Cat();
mFood = new Food(food);
mPet.eat(mFood);
}
public void feedDog(String food) {
mPet = new Dog();
mFood = new Food(food);
mPet.eat(mFood);
}
}
class Dog extends Pet{
@Override
public void eat(Food food) {
System.out.println("正在喂小狗吃"+food.getFood());
if (food.getFood().matches(Food.BONE)) {
System.out.println("小狗正在吃"+food.getFood()+"！");
}else {
System.out.println("但是小狗不喜欢吃"+food.getFood()+"!");
}
}
}
class Cat extends Pet{
@Override
public void eat(Food food) {
System.out.println("正在喂小猫吃"+food.getFood());
if (food.getFood().matches(Food.FISH)) {
System.out.println("小猫正在吃"+food.getFood()+"！");
}else {
System.out.println("但是小猫不喜欢吃"+food.getFood()+"!");
}
}
}
class Food {
public final static String BONE = ".*骨.*";
public final static String FISH = ".*鱼.*";
private String food;
public String getFood() {
return food;
}
public void setFood(String food) {
this.food = food;
}
public Food(String food) {
this.food = food;
}
}
class Pet {
public void eat(Food food) {
}
}
捕鱼的JAVA问题，大师们指导指导呗。。。
最少合伙捕到3906条鱼
A醒来发现鱼数是3906
B醒来发现鱼数是781
C醒来发现鱼数是156
D醒来发现鱼数是31
E醒来发现鱼数是6
/**
* 计算捕鱼
*/
public class Fish {
public String[] piscators = { "A", "B", "C", "D", "E"};
public static void main(String[] args) {
Fish fish = new Fish();
for (int i = 0; i 10000; i++) {
if (fish.averageFish(fish.piscators.length, i)) {
fish.averageFish(i);
break;
}
}
}
/**
* 判断平均分鱼
* @param piscatorSize
* @param fishNum
* @return
*/
public boolean averageFish(int piscatorSize, int fishNum) {
boolean isAaverage = (fishNum - 1) % piscators.length == 0;
//最后一个人也分成五分 所以piscatorSize 0 多分一次。
if (isAaverage piscatorSize 0) {
return averageFish(piscatorSize - 1, (fishNum - 1) / piscators.length);
}
return isAaverage;
}
/**
* 输出分鱼过程
* @param fishNum
*/
public void averageFish(int fishNum) {
System.out.println("最少合伙捕到"+ fishNum + "条鱼");
for (int i = 0; i piscators.length; i++) {
System.out.println(piscators[i] + "醒来发现鱼数是" + fishNum);
fishNum = (fishNum - 1) / piscators.length;
}
}
}
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