编写图形界面下的Java Swing程序，接受用户输入的两个数据为上下限，然后输出上、下限之间的所有素数。（结果部分每行显示10个数据）

这个代码我整体写的比较简单，读者可以简单参考一下，对人家题目要求略微修改了一下，多加了一个“置空”按钮。下图为我设计的界面

运行程序后的截图请看我后面的截图：

package com.wangshilin.study.app_127;

import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Color;
import java.awt.Font;

/**
 * 通过简单的Swing组件实现求两个数之间的素数！
 * @author wangshilin
 *
 */

public class Demo_app {

	private JFrame frame;
	private JTextField xiaxian;
	private JTextField shangxian;
	private JTextArea textArea;
	private JLabel label;
	private JLabel label_1;
	private JScrollPane scrollPane_1;
	private JButton bt;
	private JButton bt_chongzhi;
	
	public String sushu(int a, int b) {
		String string ="";
		int num = 0;
		for (int i = a; i <= b; i++) {
			boolean flag = true;
			for (int j = 2; j <= Math.sqrt(i); j++) {
				if (i % j == 0)
					flag = false;
			}
			if (flag == true) {
				string += Integer.toString(i) + "\t";
				num++;
			}
			if (num == 10) {
				string += "\n";
				num = 0;
			}
		}

		return string;
	}

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					Demo_app window = new Demo_app();
					window.frame.setVisible(true);
					
					/**
					 * 给执行按钮添加事件
					 */
					window.bt.addActionListener(new ActionListener() {// 给按钮添加事件接收器
						@Override
						public void actionPerformed(ActionEvent e) {// 接受到事件后,进行下面的处理
							String show="";   //显示的信息
							int a = Integer.parseInt(window.xiaxian.getText());
							int b = Integer.parseInt(window.shangxian.getText());
							if (a<=1 || b<=1) {
								window.textArea.setText("您输入的数据不合法！请检查重新输入！您输入的数必须大于或等于2");
							}else if (a >=2 && a>=2 && a > b) {
								show = window.sushu(b,a);
								window.textArea.setText(show);
							}else{
								show = window.sushu(a,b);
								window.textArea.setText(show);
							}
						}
					});
					
					/**
					 * 给重置按钮添加事件
					 */
					window.bt_chongzhi.addActionListener(new ActionListener() {
						
						@Override
						public void actionPerformed(ActionEvent e) {
							// TODO Auto-generated method stub
							window.textArea.setText(null);
							window.xiaxian.setText(null);
							window.shangxian.setText(null);
						}
					});

				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the application.
	 */
	private Demo_app() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */

	private void initialize() {
		frame = new JFrame();
		frame.setTitle("\u6211\u7684\u5C0F\u7A0B\u5E8F");
		frame.setBounds(100, 100, 973, 553);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(null);

		xiaxian = new JTextField();
		xiaxian.setToolTipText("text");
		xiaxian.setBounds(80, 57, 166, 27);
		frame.getContentPane().add(xiaxian);
		xiaxian.setColumns(10);

		shangxian = new JTextField();
		shangxian.setBounds(289, 57, 166, 27);
		frame.getContentPane().add(shangxian);
		shangxian.setColumns(10);

		label = new JLabel("\u4E0B\u9650");
		label.setFont(new Font("隶书", Font.BOLD, 24));
		label.setBounds(80, 27, 81, 21);
		frame.getContentPane().add(label);

		label_1 = new JLabel("\u4E0A\u9650");
		label_1.setFont(new Font("隶书", Font.BOLD, 22));
		label_1.setBounds(290, 27, 81, 21);
		frame.getContentPane().add(label_1);

		scrollPane_1 = new JScrollPane();
		scrollPane_1.setBounds(80, 146, 787, 313);
		frame.getContentPane().add(scrollPane_1);

		textArea = new JTextArea();
		textArea.setFont(new Font("楷体", Font.BOLD, 14));
		textArea.setTabSize(14);
		textArea.setBackground(Color.LIGHT_GRAY);
		scrollPane_1.setViewportView(textArea);


		bt = new JButton("\u6267\u884C");
		bt.setFont(new Font("楷体", Font.BOLD, 22));
		bt.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
			}
		});
		bt.setBounds(748, 56, 123, 58);
		frame.getContentPane().add(bt);
		
		JLabel label_2 = new JLabel("\u663E\u793A\u57DF");
		label_2.setFont(new Font("楷体", Font.BOLD, 23));
		label_2.setBounds(80, 119, 81, 21);
		frame.getContentPane().add(label_2);
		
		bt_chongzhi = new JButton("\u91CD\u7F6E");
		bt_chongzhi.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
			}
		});
		bt_chongzhi.setFont(new Font("楷体", Font.BOLD, 22));
		bt_chongzhi.setBounds(596, 56, 123, 58);
		frame.getContentPane().add(bt_chongzhi);
	}
}

• 如果用户输入不合法，则显示下图界面：
  
• 如果输入合法，则显示下图界面：