我正在開發一個 Java swing 中的簡單程式,當您單擊按鈕時,它會從陣列中隨機選擇一個單詞。問題是我不想在再次單擊按鈕后生成相同的東西。例如,您單擊按鈕,它會從陣列中生成單詞“donut”,再次單擊,它會再次生成 donut。我想避免之后直接生成相同的東西。
這是代碼:
import javax.swing.*;
import java.awt.*;
import java.util.Random;
import java.awt.event.*;
class Main implements ActionListener{
JFrame f = new JFrame("????????????????? ??????????????????");
Random r = new Random();
JButton generate = new JButton("Generate");
JButton clear = new JButton("Clear");
JLabel characterClass = new JLabel("Style", JLabel.CENTER);
JLabel characterClass2 = new JLabel("Race", JLabel.CENTER);
JLabel characterClass3 = new JLabel("Weapon", JLabel.CENTER);
JLabel newGenerate = new JLabel("?", JLabel.CENTER);
JLabel newGenerate2 = new JLabel("?", JLabel.CENTER);
JLabel newGenerate3 = new JLabel("?", JLabel.CENTER);
Color custBlue = new Color(10, 63, 250);
Color custOrange = new Color(251,167,88);
Color saturatedCustOrange = new Color(254, 127, 46);
ImageIcon wheel = new ImageIcon("images/loading_wheel.gif");
JLabel img = new JLabel(wheel);
ImageIcon back_image = new ImageIcon("images/back_ground.png");
JLabel img2 = new JLabel(back_image);
String[] style = {"<html><p align='center'>Steampunk</p></html>", "<html><p align='center'>Sci-Fi</p></html>", "<html><p align='center'>Medieval</p></html>", "<html><p align='center'>Imprisoned</p></html>", "<html><p align='center'>Superpowered</p></html>", "<html><p align='center'>Villainous</p></html>", "<html><p align='center'>Primal</p></html>", "<html><p align='center'>Musical</p></html>", "<html><p align='center'>Aquatic</p></html>", "<html><p align='center'>Undead</p></html>"};
String[] race = {"<html><p align='center'>Sorcerer</p></html>", "<html><p align='center'>Alien</p></html>", "<html><p align='center'>Knight</p></html>", "<html><p align='center'>Orc</p></html>", "<html><p align='center'>Elf</p></html>", "<html><p align='center'>Bear</p></html>", "<html><p align='center'>Human</p></html>", "<html><p align='center'>Vampire</p></html>", "<html><p align='center'>Werewolf</p></html>", "<html><p align='center'>Dwarf</p></html>"};
String[] weapon = {"<html><p align='center'>Bow<br />And Arrow</p></html>", "<html><p align='center'>Blade</p></html>", "<html><p align='center'>Gun</p></html>", "<html><p align='center'>Nunchucks</p></html>", "<html><p align='center'>Shield</p></html>", "<html><p align='center'>Bomb</p></html>", "<html><p align='center'>Claws</p></html>", "<html><p align='center'>Mace</p></html>", "<html><p align='center'>Axe</p></html>", "<html><p align='center'>Staff</p></html>"};
public static void main(String[] args) {
Main o = new Main();
o.gui();
}
public void gui(){
f.setSize(500, 400);
this.newGenerate.setBounds(132,107, 180, 40);
newGenerate.setFont(new Font("Arial", Font.BOLD, 20));
this.newGenerate.setForeground(saturatedCustOrange);
f.add(this.newGenerate);
this.newGenerate2.setBounds(304,107, 180, 40);
newGenerate2.setFont(new Font("Arial", Font.BOLD, 20));
this.newGenerate2.setForeground(saturatedCustOrange);
f.add(this.newGenerate2);
this.newGenerate3.setBounds(218,250, 180, 40);
newGenerate3.setFont(new Font("Arial", Font.BOLD, 20));
this.newGenerate3.setForeground(saturatedCustOrange);
f.add(this.newGenerate3);
characterClass.setBounds(132,50, 180, 40);
characterClass.setFont(new Font("Arial", Font.BOLD, 20));
this.characterClass.setForeground(saturatedCustOrange);
f.add(this.characterClass);
characterClass2.setBounds(304,50, 180, 40);
characterClass2.setFont(new Font("Arial", Font.BOLD, 20));
this.characterClass2.setForeground(saturatedCustOrange);
f.add(this.characterClass2);
characterClass3.setBounds(218,192, 180, 40);
characterClass3.setFont(new Font("Arial", Font.BOLD, 20));
this.characterClass3.setForeground(saturatedCustOrange);
f.add(this.characterClass3);
this.generate.setBounds(50, 240, 120, 40);
generate.setFont(new Font("Arial", Font.BOLD, 16));
this.generate.setForeground(custOrange);
this.generate.setBackground(custBlue);
this.generate.addActionListener(this);
f.add(this.generate);
this.clear.setBounds(50, 290, 120, 40);
clear.setFont(new Font("Arial", Font.BOLD, 16));
this.clear.setForeground(custOrange);
this.clear.setBackground(custBlue);
this.clear.addActionListener(this);
f.add(this.clear);
img.setBounds(0, -10,500,400);
f.add(img);
img2.setBounds(0, -10,500,400);
f.add(img2);
f.setLayout(null);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e){
if(e.getSource() == this.clear){
img.setVisible(true);
this.newGenerate.setText("?");
this.newGenerate2.setText("?");
this.newGenerate3.setText("?");
}
else{
this.newGenerate.setText(this.returnStyle());
this.newGenerate2.setText(this.returnRace());
this.newGenerate3.setText(this.returnWeapon());
img.setVisible(false);
}
}
public String returnStyle() {
int ranNum = r.nextInt(this.style.length);
return this.style[ranNum];
}
public String returnRace() {
int ranNum = r.nextInt(this.race.length);
return this.race[ranNum];
}
public String returnWeapon() {
int ranNum = r.nextInt(this.weapon.length);
return this.weapon[ranNum];
}
}
如果令人困惑,程式會生成一個字符。它隨機混合了人物風格(如中世紀或科幻)、種族(如人類或吸血鬼)和武器(如刀片或斧頭)。
我特別需要這部分的幫助,我最好需要用回圈來做,因為這是我能想到的唯一方法來處理這個回圈(它是我的最終專案所必需的。)
public String returnStyle() {
int ranNum = r.nextInt(this.style.length);
return this.style[ranNum];
}
uj5u.com熱心網友回復:
對于“不同”的方法,您可以使用Collections#shuffle隨機List化 a 值
首先,你需要...
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
接下來,您將需要定義一系列“隨機” List。這為我們提供了一種更簡單的方法來獲取下一個隨機值,同時保持對“原始”值的參考,例如......
private String[] masterStyles = {"<html><p align='center'>Steampunk</p></html>", "<html><p align='center'>Sci-Fi</p></html>", "<html><p align='center'>Medieval</p></html>", "<html><p align='center'>Imprisoned</p></html>", "<html><p align='center'>Superpowered</p></html>", "<html><p align='center'>Villainous</p></html>", "<html><p align='center'>Primal</p></html>", "<html><p align='center'>Musical</p></html>", "<html><p align='center'>Aquatic</p></html>", "<html><p align='center'>Undead</p></html>"};
private String[] masterRaces = {"<html><p align='center'>Sorcerer</p></html>", "<html><p align='center'>Alien</p></html>", "<html><p align='center'>Knight</p></html>", "<html><p align='center'>Orc</p></html>", "<html><p align='center'>Elf</p></html>", "<html><p align='center'>Bear</p></html>", "<html><p align='center'>Human</p></html>", "<html><p align='center'>Vampire</p></html>", "<html><p align='center'>Werewolf</p></html>", "<html><p align='center'>Dwarf</p></html>"};
private String[] masterWeapons = {"<html><p align='center'>Bow<br />And Arrow</p></html>", "<html><p align='center'>Blade</p></html>", "<html><p align='center'>Gun</p></html>", "<html><p align='center'>Nunchucks</p></html>", "<html><p align='center'>Shield</p></html>", "<html><p align='center'>Bomb</p></html>", "<html><p align='center'>Claws</p></html>", "<html><p align='center'>Mace</p></html>", "<html><p align='center'>Axe</p></html>", "<html><p align='center'>Staff</p></html>"};
private List<String> randomStyles = new ArrayList<>(8);
private List<String> randomRaces = new ArrayList<>(8);
private List<String> randomWeapons = new ArrayList<>(8);
然后,您將修改您的returnXxx方法以回傳下一個隨機值,除非,如果是 random List isEmpty,則先用原始值填充它,然后再填充它shuffle,例如...
public String returnStyle() {
if (randomStyles.isEmpty()) {
randomStyles.addAll(Arrays.asList(masterStyles));
Collections.shuffle(randomStyles);
}
return randomStyles.remove(0);
}
public String returnRace() {
if (randomRaces.isEmpty()) {
randomRaces.addAll(Arrays.asList(masterRaces));
Collections.shuffle(randomRaces);
}
return randomRaces.remove(0);
}
public String returnWeapon() {
if (randomWeapons.isEmpty()) {
randomWeapons.addAll(Arrays.asList(masterWeapons));
Collections.shuffle(randomWeapons);
}
return randomWeapons.remove(0);
}
這保證了List只有在您使用了原始值的所有值后,才會開始重復List
然后我們可以將概念封裝到一個類中以使其更容易,例如......
public class RandomList<Value> {
private List<Value> masterValues;
private List<Value> randomValues;
public RandomList(Value[] masterValues) {
this(Arrays.asList(masterValues));
}
public RandomList(List<Value> masterValues) {
this.masterValues = masterValues;
randomValues = new ArrayList<>(masterValues);
Collections.shuffle(randomValues);
}
public Value next() {
if (randomValues.isEmpty()) {
randomValues.addAll(masterValues);
Collections.shuffle(randomValues);
}
return randomValues.remove(0);
}
public Value nextOrNull() {
if (randomValues.isEmpty()) {
return null;
}
return randomValues.remove(0);
}
}
這會將您的代碼更改為...
private RandomList<String> randomStyles = new RandomList<>(new String [] {"<html><p align='center'>Steampunk</p></html>", "<html><p align='center'>Sci-Fi</p></html>", "<html><p align='center'>Medieval</p></html>", "<html><p align='center'>Imprisoned</p></html>", "<html><p align='center'>Superpowered</p></html>", "<html><p align='center'>Villainous</p></html>", "<html><p align='center'>Primal</p></html>", "<html><p align='center'>Musical</p></html>", "<html><p align='center'>Aquatic</p></html>", "<html><p align='center'>Undead</p></html>"});
private RandomList<String> randomRaces = new RandomList<>(new String [] {"<html><p align='center'>Sorcerer</p></html>", "<html><p align='center'>Alien</p></html>", "<html><p align='center'>Knight</p></html>", "<html><p align='center'>Orc</p></html>", "<html><p align='center'>Elf</p></html>", "<html><p align='center'>Bear</p></html>", "<html><p align='center'>Human</p></html>", "<html><p align='center'>Vampire</p></html>", "<html><p align='center'>Werewolf</p></html>", "<html><p align='center'>Dwarf</p></html>"});
private RandomList<String> randomWeapons = new RandomList<>(new String [] {"<html><p align='center'>Bow<br />And Arrow</p></html>", "<html><p align='center'>Blade</p></html>", "<html><p align='center'>Gun</p></html>", "<html><p align='center'>Nunchucks</p></html>", "<html><p align='center'>Shield</p></html>", "<html><p align='center'>Bomb</p></html>", "<html><p align='center'>Claws</p></html>", "<html><p align='center'>Mace</p></html>", "<html><p align='center'>Axe</p></html>", "<html><p align='center'>Staff</p></html>"});
和你的returnXxx方法......
public String returnStyle() {
return randomStyles.next();
}
public String returnRace() {
return randomRaces.next();
}
public String returnWeapon() {
return randomWeapons.next();
}
這更簡單,更干凈,并洗掉了所有重復的代碼......但是,這可能比你現在更“先進”,但要記住一些事情??
uj5u.com熱心網友回復:
基本上你可以這樣做:
ArrayList<String> fruits = new ArrayList<>(Arrays.asList("banana", "apple", "orange","grape","watermelon"));
Random r = new Random();
while(fruits.size()>0) {
int random = r.nextInt(fruits.size());
System.out.println(fruits.get(randomInt));
fruits.remove(randomInt);
}
創建一個串列。
生成一個隨機索引,彈出這個索引中的元素,重復。
uj5u.com熱心網友回復:
如果您希望它能夠重復結果,而不是它產生的最后一個結果,您可以存盤它產生的最后一個結果并檢查新結果是否相同。如果是,則生成另一個。以 ATP 的答案為例并對其進行修改以實作此目的,它將如下所示:
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class RandomGenerator
{
public static void main (String[] args) throws java.lang.Exception
{
ArrayList<String> fruits = new ArrayList<>(Arrays.asList("banana", "apple", "orange","grape","watermelon"));
Random r = new Random();
int previousRandom = -1;
int random = r.nextInt(fruits.size());
System.out.println("double size: " 2 * fruits.size());
for (int i = 0; i < 2 * fruits.size(); i ) {
if (random == previousRandom) {
random = r.nextInt(fruits.size());
i = i -1;
} else {
System.out.println(fruits.get(random));
previousRandom = random;
}
}
}
}
如果您不希望它重復任何結果,并且只生成盡可能多的結果,那么 ATP 的答案就可以解決問題。
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