嘗試生成對象時出錯 - 構造函數類

Question

我遇到了編譯我的代碼的問題。

問題似乎是當我嘗試從我的主類中的客戶類生成對象。 CareHire主類中的代碼行如下：

newCust[i]=new Customer(); 

我輸入一個字符串和整數，併爲數組中的每個條目編號。這是我打算用於每個實例的路線，但它顯然不正確，我不確定如何繼續。

當我編輯這條線，我要建立。點擊「Enter」按鈕，只顯示字符串而不顯示int值。我應該在這裏做什麼？

主類：CareHire

package CareHire; 

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*; 
import java.util.Scanner; 


public class CareHire extends JFrame implements ActionListener 
{ 
private JLabel nameLabel=new JLabel("Name"); 
private JLabel daysLabel=new JLabel("Days of Hire"); 
private JTextField nameField=new JTextField(16); 
    private JTextField daysField=new JTextField(11); 
    private JButton enterButton=new JButton("Enter"); 
private JButton displayButton=new JButton("Display"); 
    private JButton searchButton= new JButton("Search"); 
    private JButton displayStatButton=new JButton("Statistics"); 
    private JButton exitButton=new JButton("Exit"); 
    private JTextArea textArea=new JTextArea(16,35); 
    private Customer newCust[]=new Customer[20]; 
    int numProcessed=0; 
    private static final int FRAME_WIDTH = 480; 
    private static final int FRAME_HEIGHT = 430; 

//This is the problematic section 

public CareHire() { 

     super(" Care Hire System "); 
     setLayout(new FlowLayout()); 

//Issues appears to be with this For Loop 

     for(int i=0;i<20;i++) { 
     newCust[i]=new Customer(); 
    } 

//End there. Remainder of code is provided for context. 

     add(nameLabel);    
     add(nameField); 
     add(daysLabel); 
     add(daysField); 

     add(enterButton); 
     add(displayButton); 
     add(searchButton); 
     add(displayStatButton); 
     add(exitButton); 

     add(textArea); 
     enterButton.addActionListener(this); 
     displayButton.addActionListener(this); 
     searchButton.addActionListener(this); 
     displayStatButton.addActionListener(this); 
     exitButton.addActionListener(this); 
    } 
} 

    public void processInput() 
    { 
    textArea.setText(nameField.getText()); 
    newCust[numProcessed].setDoH(Integer.parseInt(daysField.getText()));    
    String title="Customer Days of Hire ($)\n\n"; 
    textArea.setText(title+newCust[numProcessed].getName()+ "\t $"+newCust[numProcessed].getDoH()+"\t "+" ");    
    nameField.setText("");     
    daysField.setText("");     
    numProcessed++; 
} 

    public void display()  { 
       if(numProcessed==0) { //no data entered    
     JOptionPane.showMessageDialog(null,"Need Customers","Display All",JOptionPane.ERROR_MESSAGE);   
     return;  
     }  
     String allItems="";  
     for(int i=0;i<numProcessed;i++) {  
      allItems=allItems+(i+1)+".\t"+newCust[i].getName()+ "\t\t $"+newCust[i].getDoH()+"\t "+" "+"\n";}  

     textArea.setText("No.\t Customer \t Days of Hire \n\n"+allItems); 
    } 

    public void search() 
    { 

    } 



     public void statistics()  { 

if(numProcessed==0){ //no data entered     
JOptionPane.showMessageDialog(null,"Need Customers", "Find Max",JOptionPane.ERROR_MESSAGE);   
return; 
    } 

String maxName=null; 
int maxAmount=-10000; 


for(int i=0;i<numProcessed;i++) { 
if(newCust[i].getDoH()>maxAmount){ 
maxAmount=newCust[i].getDoH(); 
maxName=newCust[i].getName(); 
} 
} 
} 

    public static void main(String[] args) 
    { 
     JFrame frame = new CareHire(); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setSize(FRAME_WIDTH, FRAME_HEIGHT); 
     frame.setVisible(true); 
     frame.setResizable(false); 
    } 
} 

容器類：客戶

package CareHire; 

public class Customer { 

private String name; 
private int doh; 

public Customer(String custName, int totalDays) {  
name = custName; 
doh = totalDays; 
} 

public void setName(String custName) { 
name = custName; 
} 

public String getName() { 
return name; 
} 

public void setDoH(int totalDays) { 
doh = totalDays; 
} 

public int getDoH() { 
return doh; 
} 
} 

Answer 1

這個語法錯誤s[i]=String new custName();

應該s[i] = new Customer();

「S」 被聲明爲客戶陣列private Customer s[]=new Customer[20]

我假設Cusotmer有一個構造函數或一些方法來添加聘用數據的姓名和天數。您需要分享更多的代碼才能看到如何填充對象。