Question

我正在创建一个程序，用户输入他们所有作业的等级和每个作业的权重，程序计算总成绩。

几乎完成了这个程序，有来自这里/互联网的大量帮助，但我不知道如何做这个最后一节。

因此，当用户点击进入时，程序将聚合所有标记，同时考虑其特定的重量并输出平均值。例如：

这样的等式是重量/ 100 *标记。（将它们全部加在一起）。所以......（40/100）* 60 +（40/100）* 80 ......等等

那我怎么能用我的程序做到这一点？我需要实现某种类型的for循环，因为赋值的数量一直在变化。

我已经在Enter按钮上实现了一个actionlistener，Mark / Weight / Assignment计数器被传递给下一个类。

然而，actionlistener只记录最后一个标记/重量。在上面的例子中是50和20。这是我面临的另一个问题。

所以基本上我要求一种方法来获取所有JTextField的输入并分析它们以创建一个汇总所有分数的输出。（考虑到他们的体重）

代码：

public class test{

public JButton button;

private static final Insets normalInsets = new Insets(10,10,0,10);
private static final Insets finalInsets = new Insets(10,10,10,10);

private static JPanel createMainPanel(){
    GridBagConstraints gbc = new GridBagConstraints();

    //Adding the JPanels. Panel for instructions
    JPanel panel = new JPanel();
    panel.setLayout(new GridBagLayout());

    int gridy = 1;

    //JLabel for the Instructions
    JTextArea instructionTextArea = new JTextArea(5, 30);
    instructionTextArea.setEditable(false);
    instructionTextArea.setLineWrap(true);
    instructionTextArea.setWrapStyleWord(true);

    JScrollPane instructionScrollPane = new JScrollPane(instructionTextArea);
    addComponent(panel, instructionScrollPane, 0, gridy++, 3, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

    //JLabels for Assignment
    JLabel label1 = new JLabel("Assignment");
    label1.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, label1, 0, gridy, 1, 1, finalInsets,GridBagConstraints.CENTER,GridBagConstraints.HORIZONTAL);

    //JLabel for Mark
    JLabel label2 = new JLabel("Mark");
    label2.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, label2, 1, gridy, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

    //JLabel for Weight.
    JLabel label3 = new JLabel("Weight");
    label3.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, label3, 2, gridy++, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

    //JLabel Number for the number list of assignments at the side.
    gbc.gridy = 3;

    for(int i = 1; i<=3; i++){
        String kok = String.valueOf(i);
    JLabel number = new JLabel(kok);
    number.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, number, 0, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
    }
    gbc.gridy =3;

    //JTextfield for Mark
    for(int i=0; i<3; i++){
    JTextField mark = new JTextField(20);
    mark.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, mark, 1, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
    }
    gbc.gridy = 3;

    //JTextfield for Weight       
    for(int i=0; i<3; i++){    
    JTextField weight = new JTextField(20);
    weight.setHorizontalAlignment(JLabel.CENTER);   
    addComponent(panel, weight, 2, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
    }

    JButton button = new JButton("Enter");
    button.setHorizontalAlignment(SwingConstants.CENTER);
    addComponent(panel, button, 3, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.CENTER);

return panel;
}

private static void addComponent(Container container, Component component, int gridx, int gridy, int gridwidth, int gridheight, Insets insets, int anchor, int fill ){
    GridBagConstraints grid = new GridBagConstraints(gridx, gridy, gridwidth, gridheight, 1.0D,1.0D,anchor,fill,insets,0,0);
    container.add(component,grid);
}


    public static void main(String[] args) {    
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(createMainPanel());
    frame.pack();
    frame.setVisible(true);
    new test();
}

下一个有标记/重量信息的课程。

public class test1 implements ActionListener { 

 private final JTextField mark;
 private final JTextField weight;



public test1(JTextField mark, JTextField weight) {
    this.mark = mark;
    this.weight = weight;

}


@Override
public void actionPerformed(ActionEvent e) {

String markstring = mark.getText();
String weightstring = weight.getText();

double markdouble = Double.parseDouble(markstring);
double weightdouble = Double.parseDouble(weightstring);  

}

Answer 1

您只需将JTextFields保存在矢量中，以便日后再访问。
你不需要第二堂课。

还创建了按钮的监听器。

import java.awt.Component;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class Test {
    public JButton button;

    private static final Insets normalInsets = new Insets(10,10,0,10);
    private static final Insets finalInsets = new Insets(10,10,10,10);

    public final static int NUM_OF_FIELDS = 3;

    private static JTextField[] markTextFields = new JTextField[NUM_OF_FIELDS];
    private static JTextField[] weightTextFields = new JTextField[NUM_OF_FIELDS];

    private static JPanel createMainPanel() {
        GridBagConstraints gbc = new GridBagConstraints();

        //Adding the JPanels. Panel for instructions
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());

        int gridy = 1;

        //JLabel for the Instructions
        JTextArea instructionTextArea = new JTextArea(5, 30);
        instructionTextArea.setEditable(false);
        instructionTextArea.setLineWrap(true);
        instructionTextArea.setWrapStyleWord(true);

        JScrollPane instructionScrollPane = new JScrollPane(instructionTextArea);
        addComponent(panel, instructionScrollPane, 0, gridy++, 3, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

        //JLabels for Assignment
        JLabel label1 = new JLabel("Assignment");
        label1.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label1, 0, gridy, 1, 1, finalInsets,GridBagConstraints.CENTER,GridBagConstraints.HORIZONTAL);

        //JLabel for Mark
        JLabel label2 = new JLabel("Mark");
        label2.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label2, 1, gridy, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

        //JLabel for Weight.
        JLabel label3 = new JLabel("Weight");
        label3.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label3, 2, gridy++, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

        //JLabel Number for the number list of assignments at the side.
        gbc.gridy = 3;

        for (int i = 1; i <= 3; i++) {
            String kok = String.valueOf(i);
            JLabel number = new JLabel(kok);
            number.setHorizontalAlignment(JLabel.CENTER);
            addComponent(panel, number, 0, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
        }
        gbc.gridy = 3;

        //JTextfield for Mark
        for (int i = 0; i < NUM_OF_FIELDS; i++) {
            JTextField mark = new JTextField(20);
            markTextFields[i] = mark;
            mark.setHorizontalAlignment(JLabel.CENTER);
            addComponent(panel, mark, 1, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.NONE);
        }
        gbc.gridy = 3;

        //JTextfield for Weight       
        for (int i = 0; i < NUM_OF_FIELDS; i++) {    
            JTextField weight = new JTextField(20);
            weightTextFields[i] = weight;
            weight.setHorizontalAlignment(JLabel.CENTER);   
            addComponent(panel, weight, 2, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
        }

        JButton button = new JButton("Enter");
        button.setHorizontalAlignment(SwingConstants.CENTER);
        addComponent(panel, button, 3, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.CENTER);
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                double finalScore = 0;
                for (int i = 0; i < NUM_OF_FIELDS; i++) {
                    double weight = Double.parseDouble(weightTextFields[i].getText());
                    double mark = Double.parseDouble(markTextFields[i].getText());
                    finalScore += weight / 100 * mark;
                }
                JOptionPane.showMessageDialog(null, "Final score: " + finalScore, "Final Score", JOptionPane.OK_OPTION);
            }
        });
        return panel;
    }

    private static void addComponent(Container container, Component component, int gridx, int gridy, int gridwidth, int gridheight, Insets insets, int anchor, int fill) {
        GridBagConstraints grid = new GridBagConstraints(gridx, gridy, gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0, 0);
        container.add(component, grid);
    }

    public static void main(String[] args) {    
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(createMainPanel());
        frame.pack();
        frame.setVisible(true);
        new Test();
    }
}

检索和分析来自多个JTextField的数据

1 个答案: