JTextField输入和输出(JTextField input and output)

 我正在尝试用Java设计Mile to Nautical Mile计算器。 
 
 我能够通过控制台创建并运行它，但我在学习如何在JFrame中进行操作时遇到了麻烦。 
 
 我基本上想做的是： 
 
 有两个文本字段和一个按钮，一个文本字段英里和一个海里，当您将金额输入一个然后按下按钮时，结果将显示在另一个字段中。 
 
 我在下面粘贴了我的代码 
 
 不确定接下来该做什么 
 
package Mile_Conversion;

import java.awt.*;
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.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class OwnWindow implements ActionListener{



    public static void main(String[] args) {
        MyJFrame();

    }

    public static void MyJFrame() {

        //JLabel
        JLabel start = new JLabel("Enter the amount below to calculate");
        start.setBounds(/*x*/70, -65/*Y*/, 270, 150); // x, y, width, height    x across, y down
        JLabel milecon = new JLabel("Miles");
        milecon.setBounds(154, 55, 50, 150);
        JLabel nautcon = new JLabel("Nautical Miles");
        nautcon.setBounds(135, -15, 150, 150);

        //JTextField
        JTextField miles = new JTextField();
        miles.setBounds(100, 140, 150, 25);
        JTextField nautical = new JTextField();
        nautical.setBounds(100, 70, 150, 25);

        double mile, nautmile;

    /*
            mile = nautmile * 0.868;

            nautmile = mile * 1.150; 
    */

        //JButton
        JButton convert = new JButton("Convert");
        convert.setBounds(250, 200, 90, 25);


        //JFrame
        JFrame window = new JFrame("Milage Conversion");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(400, 300);
        window.setVisible(true);
        window.setLayout(null);
        window.setResizable(false);
        window.add(start);
        window.add(miles);
        window.add(nautical);
        window.add(convert);
        window.add(milecon);
        window.add(nautcon);

    }

    @Override
    public void actionPerformed(ActionEvent e) {


    }
}

I'm trying to design a Mile to Nautical Mile calculator in Java.
 
I was able to create and run it okay through the console, but i'm having trouble learning how to do it in JFrames.
 
what im basically wanting to do is:
 
Have two text fields and a button, one text field miles and one for nautical miles, when you enter the amount into one then press the button the result will display in the other field.
 
I've pasted my code below
 
Not really sure what to do next
 
package Mile_Conversion;

import java.awt.*;
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.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class OwnWindow implements ActionListener{



    public static void main(String[] args) {
        MyJFrame();

    }

    public static void MyJFrame() {

        //JLabel
        JLabel start = new JLabel("Enter the amount below to calculate");
        start.setBounds(/*x*/70, -65/*Y*/, 270, 150); // x, y, width, height    x across, y down
        JLabel milecon = new JLabel("Miles");
        milecon.setBounds(154, 55, 50, 150);
        JLabel nautcon = new JLabel("Nautical Miles");
        nautcon.setBounds(135, -15, 150, 150);

        //JTextField
        JTextField miles = new JTextField();
        miles.setBounds(100, 140, 150, 25);
        JTextField nautical = new JTextField();
        nautical.setBounds(100, 70, 150, 25);

        double mile, nautmile;

    /*
            mile = nautmile * 0.868;

            nautmile = mile * 1.150; 
    */

        //JButton
        JButton convert = new JButton("Convert");
        convert.setBounds(250, 200, 90, 25);


        //JFrame
        JFrame window = new JFrame("Milage Conversion");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(400, 300);
        window.setVisible(true);
        window.setLayout(null);
        window.setResizable(false);
        window.add(start);
        window.add(miles);
        window.add(nautical);
        window.add(convert);
        window.add(milecon);
        window.add(nautcon);

    }

    @Override
    public void actionPerformed(ActionEvent e) {


    }
}

原文：https://stackoverflow.com/questions/12713052