Java 如何从10个文本字段中获取值，并使用一个按钮将选择输出到文本字段或区域中？（附代码）

我们正在尝试设计一组文本字段，用户可以在其中输入一个值，具体取决于他们想要的产品数量。我们有一个按钮叫结帐

基本上，有两个类，一个称为FoodDept（其中包含所有文本字段和checkout按钮），另一个称为checkout，其中有一个文本字段或区域，我可以输出用户指示的选项或数字。这基本上就是我所需要的

package shopping;
import java.util.*;

public class foodDept extends javax.swing.JFrame {

    /**
     * Creates new form foodDept
     */
    int apple;
    int banana;
    double a = 0;
    double b = 0;


    public foodDept() {
        initComponents();
        apple=0;
        banana=0;
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        appleLabel = new javax.swing.JLabel();
        appleField = new javax.swing.JTextField();
        backBtn = new javax.swing.JButton();
        bananaLabel = new javax.swing.JLabel();
        bananaField = new javax.swing.JTextField();
        checkoutBtn = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        appleLabel.setText("Apple ($1.99):");

        appleField.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                appleFieldActionPerformed(evt);
            }
        });

        backBtn.setText("Back");
        backBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                backBtnActionPerformed(evt);
            }
        });

        bananaLabel.setText("Banana ($0.99):");

        checkoutBtn.setText("jButton1");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(backBtn)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 152, Short.MAX_VALUE)
                        .addComponent(checkoutBtn))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(appleLabel)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(appleField))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(bananaLabel)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(bananaField, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(0, 0, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(appleLabel)
                    .addComponent(appleField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(bananaLabel)
                    .addComponent(bananaField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 59, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(backBtn)
                    .addComponent(checkoutBtn))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void backBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        new dept().setVisible(true);
        dispose();
    }                                       

    void setApple(int a){
        apple=a;
    }
    int getApple(){
    return apple;
    }

    public double getTotal(){
    return a+b;

    }
    private void appleFieldActionPerformed(java.awt.event.ActionEvent evt) {                                           

    }                                          

    public void checkoutBtnActionPerformed(java.awt.event.ActionEvent evt) {                                            

        try{
            double priceOfapple = 1.99;
            int quantity = Integer.parseInt(appleField.getText());
            double totalamount = priceOfapple*quantity;
            checkout.resultField.setText(totalamount);
        }


        b = Double.parseDouble(bananaField.getText());

        foodList fL = new foodList(apple,banana);

        if(a > 0){
            a=a*1.99;
        }

        if(b > 0){
            b=b*0.99;
        } 


        new checkout().setVisible(true);
        dispose();
    } 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(foodDept.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(foodDept.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(foodDept.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(foodDept.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        //ArrayList<Double> orderList = new ArrayList<Double>();//ARRAYYYYY

        //here

        //for(int x = 0; x<= orderList.size();x++){

        //}   

        foodDept a = new foodDept();

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new foodDept().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    public javax.swing.JTextField appleField;
    private javax.swing.JLabel appleLabel;
    private javax.swing.JButton backBtn;
    private javax.swing.JTextField bananaField;
    private javax.swing.JLabel bananaLabel;
    public javax.swing.JButton checkoutBtn;
    // End of variables declaration                   
}

**********************************************************************************

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package shopping;
import java.util.ArrayList;
import shopping.foodDept;
import shopping.foodDept;
import shopping.foodDept;
/**
 *
 * @author Kevin
 */
public class checkout extends javax.swing.JFrame {

    /**
     * Creates new form checkout
     */
    public checkout() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        backBtn = new javax.swing.JButton();
        purchaseBtn = new javax.swing.JButton();
        resultField = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        backBtn.setText("Back");
        backBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                backBtnActionPerformed(evt);
            }
        });

        purchaseBtn.setText("Purchase");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(resultField)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(backBtn)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 148, Short.MAX_VALUE)
                        .addComponent(purchaseBtn)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(resultField, javax.swing.GroupLayout.DEFAULT_SIZE, 89, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(purchaseBtn)
                    .addComponent(backBtn))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void backBtnActionPerformed(java.awt.event.ActionEvent evt) {                                        
        new foodDept().setVisible(true);
        dispose();
    }                                       



    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(checkout.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(checkout.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(checkout.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(checkout.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>



        //for(int x = 0; x<= orderList.size();x++){
            //resultField.setText(orderList.get(x));
            //}

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new checkout().setVisible(true);
            }




        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton backBtn;
    private javax.swing.JButton purchaseBtn;
    public javax.swing.JTextField resultField;
    // End of variables declaration                   
}

套餐购物；
导入java.util.*；
公共类foodDept扩展了javax.swing.JFrame{
/**
*创建新表单foodDept
*/
苹果；
香蕉；
双a=0；
双b=0；
公共食品{
初始化组件（）；
苹果=0；
香蕉=0；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//                           
私有组件（）{
appleLabel=newjavax.swing.JLabel（）；
appleField=newjavax.swing.JTextField（）；
backBtn=newjavax.swing.JButton（）；
bananaLabel=newjavax.swing.JLabel（）；
bananaField=newjavax.swing.JTextField（）；
checkoutBtn=newjavax.swing.JButton（）；
setDefaultCloseOperation（javax.swing.WindowConstants.EXIT_ON_CLOSE）；
appleLabel.setText（“苹果（$1.99）：”）；
addActionListener（新的java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
执行的AppleFieldAction（evt）；
}
});
backBtn.setText（“Back”）；
backBtn.addActionListener（新的java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
已执行的备份操作（evt）；
}
});
bananaLabel.setText（“香蕉（$0.99）：”）；
checkoutBtn.setText（“jButton1”）；
javax.swing.GroupLayout=newjavax.swing.GroupLayout（getContentPane（））；
getContentPane（）.setLayout（布局）；
layout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addContainerGap（）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addComponent（backBtn）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED，152，Short.MAX_值）
.addComponent（签出BTN））
.addGroup（layout.createSequentialGroup（）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING，false）
.addGroup（layout.createSequentialGroup（）
.addComponent（appleLabel）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.UNRELATED）
.addComponent（appleField））
.addGroup（layout.createSequentialGroup（）
.addComponent（bananaLabel）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（bananaField，javax.swing.GroupLayout.PREFERRED_SIZE，50，javax.swing.GroupLayout.PREFERRED_SIZE）））
.addGap（0，0，短.MAX_值）））
.addContainerGap（））
);
layout.setVerticalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（layout.createSequentialGroup（）
.addContainerGap（）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（appleLabel）
.addComponent（appleField，javax.swing.GroupLayout.PREFERRED\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.PREFERRED\u SIZE））
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（bananaLabel）
.addComponent（bananaField，javax.swing.GroupLayout.PREFERRED\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.PREFERRED\u SIZE））
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED，59，Short.MAX_值）
.addGroup（layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（backBtn）
.addComponent（签出BTN））
.addContainerGap（））
);
包装（）；
}//                         
私有void backBtnActionPerformed（java.awt.event.ActionEvent evt）{
新部门（）设置可见（true）；
处置（）；
}                                       
无效设置苹果（INTA）{
苹果=a；
}
int getApple（）{
还苹果；
}
公共双getTotal（）{
返回a+b；
}
private void appleFieldActionPerformed（java.awt.event.ActionEvent evt）{
}                                          
public void checkoutBtnActionPerformed（java.awt.event.ActionEvent evt）{
试一试{
苹果的双倍价格=1.99；
int quantity=Integer.parseInt（appleField.getText（））；
双倍总额=苹果价格*数量；
checkout.resultField.setText（totalamount）；
}
b=Doub
public class Checkout extends JDialog {

    List<String> dataToBeDisplayed;

    ...

    public void setDataToBeDisplayed(List<String> data) {
        this.dataToBeDisplayed = data;
    }

    private void initComponents() {
        JTextArea textArea = new JTextArea(20,30);
        for(String line : dataToBeDisplayed) {
            textArea.append(line + System.lineSeparator());
        }
        getContentPane().add(new JScrollPane(textArea));
    }
}

Checkout checkout = new Checkout(this, true);
checkout.setDataToBeDisplayed(data); // data must be created and populated before this call
checkout.setVisible(true);