我想在 getRandom 方法中从 ArrayList 中获取一个随机单词。我的 ArrayList 是从文件加载的。然后我将在刽子手游戏中使用这个词。所以我希望它被打印成 *****
import java.util.*;
import java.io.*;
public class Application {
private ArrayList<Pirateword> piratewords;
private Scanner input;
public Application(){
input=new Scanner(System.in);
piratewords=new ArrayList<Pirateword>();
}
public void runApplication() throws IOException {
String response;
String w;
do {
load("piratewords.txt");
save("piratewords.txt");
response=input.nextLine();
} while (!((response.equals("q")|| (response.equals("q")))));
System.out.println("Thank you for playing");
}
public void load(String fileName) throws IOException{
Scanner infile =new Scanner(new InputStreamReader(new FileInputStream(fileName)));
int num=infile.nextInt();infile.nextLine();
for (int i=0;i<num;i++) {
String w=infile.nextLine();
Pirateword p=new Pirateword(w);
piratewords.add(p);
}
infile.close();
}
public void save(String fileName) throws IOException{
PrintWriter outfile = new PrintWriter(new OutputStreamWriter(new FileOutputStream(fileName)));
outfile.println(piratewords.size());
for (Pirateword p:piratewords) {
outfile.println(p.toString());
}
outfile.close();
}
public void getRandom() {
}
}
最佳答案
public String getRandom() {
return piratewords.get(new Random().nextInt(piratewords.size());
}
关于java - 从数组列表中获取随机单词，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23032851/