Variablenwert auf neue Methode übertragen

Question

Ich bin neu in Java und ich kann meine Methode nicht funktionieren lassen, ohne die Variable auf einen Wert von 'null' oder ein neues Objekt zurücksetzen zu müssen. Was ich brauche, ist, dass die Benutzereingabe in die nächste Methode übernommen wird.

public static void addItem() 
{ 
    Scanner console = new Scanner(System.in); 

    String desc, id, str=""; 
    double price = 0, setUpPrice = 0, unitCost = 0, inventoryCost = 0; 
    int stock = 0, demand = 0; 
    Product product = new Product(); 


    System.out.print("Please enter product description between 3 to 10 characters...: "); 
    desc = console.next(); 
    desc = desc.toLowerCase(); 
    product.setName(desc); 


    /*if (desc.length < 3 || desc.length > 10) 
    { 
     System.out.print("This Input is incorrect, Please try again."); 
    }*/ 
    System.out.print("Please enter price in $ : "); 
    price = console.nextDouble(); 
    System.out.print("Please enter set up price. $ : "); 
    setUpPrice = console.nextDouble(); 
    System.out.print("Please enter unit- cost. $ : "); 
    unitCost = console.nextDouble(); 
    System.out.print("Please enter the inventory cost. $ : "); 
    inventoryCost = console.nextDouble(); 
    System.out.print("Please enter the amount in stock : "); 
    stock = console.nextInt(); 
    System.out.print("Please enter the demand of the product : "); 
    demand = console.nextInt(); 


    // need code here to repeat the fuction again if y is pressed. 
    // if n is pressed need to return to inventory management interface. 

} 

public static void prodData() 
{ 
    Product product = new Product(); 

    System.out.println("The information for the product is : "); 
    System.out.println("Product description : "+product.getName()); 
} 

Answer 1

Erklären Sie Ihre Produkt var als global und Zugriff wie folgt

public static Product product; 

public static void addItem() { 
    product = new Product(); 
    Scanner console = new Scanner(System.in); 

    String desc, id, str=""; 
    double price = 0, setUpPrice = 0, unitCost = 0, inventoryCost = 0; 
    int stock = 0, demand = 0; 

    System.out.print("Please enter product description between 3 to 10 characters...: "); 
    desc = console.next(); 
    desc = desc.toLowerCase(); 
    product.setName(desc); 


    /*if (desc.length < 3 || desc.length > 10) 
    { 
     System.out.print("This Input is incorrect, Please try again."); 
    }*/ 
    System.out.print("Please enter price in $ : "); 
    price = console.nextDouble(); 
    System.out.print("Please enter set up price. $ : "); 
    setUpPrice = console.nextDouble(); 
    System.out.print("Please enter unit- cost. $ : "); 
    unitCost = console.nextDouble(); 
    System.out.print("Please enter the inventory cost. $ : "); 
    inventoryCost = console.nextDouble(); 
    System.out.print("Please enter the amount in stock : "); 
    stock = console.nextInt(); 
    System.out.print("Please enter the demand of the product : "); 
    demand = console.nextInt(); 

    // need code here to repeat the fuction again if y is pressed. 
    // if n is pressed need to return to inventory management interface. 

} 

public static void prodData() { 
    System.out.println("The information for the product is : "); 
    System.out.println("Product description : "+product.getName()); 
}