我试图让Java询问用户他们拥有的工作数量以及这些工作的名称。

Question

我希望用户能够输入多个作业，然后输入每个作业的名称。现在我有点用 if else 语句来强迫它

System.out.println("How many jobs have you had?");
int numberjobs = scanner.nextInt();
if (numberjobs == 3) {
    System.out.println("What was your first job?");
    scanner.nextLine();
    company1 = scanner.nextLine();
    System.out.println("What was your second job?");
    company2 = scanner.nextLine();
    System.out.println("What was your third job?");
    company3 = scanner.nextLine();
} else if (numberjobs == 2) {
    System.out.println("What was your first job?");
    scanner.nextLine();
    company1 = scanner.nextLine();
    System.out.println("What was your second job?");
    company2 = scanner.nextLine();
} else if (numberjobs == 1) {
    System.out.println("What was your first job?");
    scanner.nextLine();
    company1 = scanner.nextLine();
}

有没有办法更容易地制作循环？我可以对输入的作业数进行无上限的循环吗？

Answer 1

创建一个公司的集合，然后使用循环填充它：

List<String> companies = new ArrayList<>();
System.out.println("How many jobs have you had?");
int numberjobs = scanner.nextInt();
for (int i=0; i < numberjobs; ++i) {
    System.out.println("Enter job " + i + " please:");
    String company = scanner.nextLine();
    companies.add(company);
}

我们也可以在这里使用数组，但如果程序中的逻辑稍后需要添加更多作业，List会更灵活。

Answer 2

是的，您可以使用循环：

System.out.println("How many jobs have you had?");
int numberjobs = scanner.nextInt();
String companies[] = new String[numberjobs];
for(int i=0; i<numberjobs; i++) {
    System.out.println("What was your job #" + (i+1) + "?");
    company[i] = scanner.nextLine();
}