Java 尝试生成对象时出错-构造函数类
我在编译代码时遇到问题 问题似乎是当我尝试从主类中的Customer类生成对象时。CareHire主类中的代码行是:Java 尝试生成对象时出错-构造函数类,java,string,exception,int,containers,Java,String,Exception,Int,Containers,我在编译代码时遇到问题 问题似乎是当我尝试从主类中的Customer类生成对象时。CareHire主类中的代码行是: newCust[i]=new Customer(); 我输入一个字符串和Int,并对数组中的每个条目进行编号。这是我计划在每个实例中使用的线路,尽管它显然不正确,我不确定如何继续 当我编辑这一行时,我将构建。单击“回车”按钮仅显示字符串,而不显示int值。我应该在这里做什么 主要类别:凯瑞 package CareHire; import java.awt.*; import
newCust[i]=new Customer();
我输入一个字符串和Int,并对数组中的每个条目进行编号。这是我计划在每个实例中使用的线路,尽管它显然不正确,我不确定如何继续
当我编辑这一行时,我将构建。单击“回车”按钮仅显示字符串,而不显示int值。我应该在这里做什么
主要类别:凯瑞
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);
}
}
此语法错误
s[i]=String new custName()代码>
应该是s[i]=new Customer()代码>
“s”声明为客户数组私人客户s[]=新客户[20]
我假设Cusotmer有一个构造函数或一些方法来添加雇用数据的名称和天数。您需要为我共享更多代码,以了解如何准确填充对象。s[i]=int new custName()
也不会编译。请改进您的标题并添加一个问题,因为目前还不清楚您在问什么。对不起,我在调查问题时一直在努力使其易读。我想问题可能是我不确定我应该问什么问题。这把我难住了。我用一段连环提问更新了正文。
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;
}
}