每盒包含多個資訊的陣列

所以我有這個練習題，我應該用員工的資訊創建一個陣列并將其傳遞給班級；我的代碼有問題，我似乎無法弄清楚。

代碼的目的是：將代碼中看到的資訊放入一個陣列中，然后傳遞給類中的方法，然后列印給用戶。（類中的代碼非常好，因此這里不包含它）。

如果有人可以提供幫助，那就太棒了。

謝謝你。

// 代碼。

    // The Scanners.
    Scanner input = new Scanner(System.in);
    Scanner scan = new Scanner(System.in);
    
    // Taking Number Of Employees From The User.
    System.out.println("How many employees are there: ");
    int numberOfEmployees = input.nextInt();
    
    //Creating An Array With The Size Of Employees Entered By The User.
    Employee[] E = new Employee[numberOfEmployees];
    
    // Filling Out Information About Employees In Array.
    for(int i = 0; i <= E.length-1; i  ){
        System.out.println("Enter employee "   i   "'s name: ");
        String name = scan.nextLine();
        
        System.out.println("Enter employee "   i   "'s birth date: ");
        String bday = scan.nextLine();
        
        System.out.println("Enter employee "   i   "'s salary: ");
        double salary = input.nextDouble();
        
        System.out.println("Enter employee "   i   "'s overtime: ");
        int overtime = input.nextInt();
        
        E[i] = (name, bday, salary, overtime);
    }
    
    System.out.println("Employee's Information"
              "\n----------------------"
              "\n----------------------");
    
    for(int i = 0; i <= E.length-1; i  ){
        E[i].print();
    }
}

uj5u.com熱心網友回復：

這里有兩個問題需要解決。

第一，不要創建多個Scanner物件，從System.in. 我知道你這樣做了，因為這個問題（檢查出來）：掃描儀在使用 next() 或 nextFoo() 后跳過 nextLine()？- 但除了創建另一個Scanner.

第二個問題在這里：

E[i] = (name, bday, salary, overtime);

你有一個Employee[]你想要填充的。但是你的語法錯了。你實際上想要創建一個new Employee(...)來填充你的陣列。

所以這一行應該是正確的（前提是Employee具有給定型別的建構式）：

E[i] = new Employee(name, bday, salary, overtime);

在您的代碼片段中考慮這一點時：

Scanner scan = new Scanner(System.in);
// Taking Number Of Employees From The User.
System.out.println("How many employees are there: ");
int numberOfEmployees = scan.nextInt();
scan.nextLine(); // <- reads the newline from the console

//Creating An Array With The Size Of Employees Entered By The User.
Employee[] E = new Employee[numberOfEmployees];

// Filling Out Information About Employees In Array.
for(int i = 0; i <= E.length-1; i  ){
    System.out.println("Enter employee "   i   "'s name: ");
    String name = scan.nextLine();
    
    System.out.println("Enter employee "   i   "'s birth date: ");
    String bday = scan.nextLine();
    
    System.out.println("Enter employee "   i   "'s salary: ");
    double salary = scan.nextDouble();
    
    System.out.println("Enter employee "   i   "'s overtime: ");
    int overtime = scan.nextInt();
    
    // create a new employee with the entered information and save in the array
    E[i] = new Employee(name, bday, salary, overtime);
}

uj5u.com熱心網友回復：

我不確定雙掃描儀。

顯而易見的是，由于您定義了一個 Employee 物件型別的空陣列，該陣列只能由 Employee 物件容納。

Employee[] E = new Employee[numberOfEmployees]

要定義一個物件，您需要為其分配記憶體，例如：

new Employee(name, bday, salary, overtime);

然后將其分配到陣列 E

E[i] = new Employee(name, bday, salary, overtime);

我希望能把事情弄清楚。

標籤：爪哇 数组 班级 方法

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