Jfame制作一个计算（a,b）之间质数的java application

代码如下：

package SwingTest3;

import java.awt.Button;

import java.awt.Color;

import java.awt.Rectangle;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import org.omg.CORBA.INTERNAL;

import com.sun.jndi.url.dns.dnsURLContext;

public class SwingTest3 extends JFrame {

static JTextField tf1 = new JTextField();

static JTextField tf2 = new JTextField();

static JTextField tf3 = new JTextField();

static JTextField tf4 = new JTextField();

static JTextArea ta = new JTextArea();

static int num =0 ;

//*滚动条**//

JScrollPane jp = new JScrollPane(ta,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,

JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

public SwingTest3(){

setLayout(null);

add(jp);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setLocation(300,300);

setSize(500, 400);

Button bt1 = new Button(“求a,b之间的质数”);

Button bt2 = new Button(“质数个数”);

bt1.addActionListener(new GetAction());

JLabel l1 =new JLabel(“输入a值：”);

JLabel l2 = new JLabel(“输入b值”);

JLabel l3 = new JLabel(“每行显示的个数”);

tf1.setBounds(new Rectangle(40, 50, 70, 25));

tf2.setBounds(new Rectangle(130, 50, 70, 25));

tf3.setBounds(new Rectangle(220, 50, 70, 25));

ta.setEditable(true);

ta.setText(” “);

ta.setBackground(Color.white);

ta.setBounds(new Rectangle(40,100,400,200));

l1.setBounds(new Rectangle(40, 20, 60, 25));

l2.setBounds(new Rectangle(130, 20, 60, 25));

l3.setBounds(new Rectangle(220, 20, 60, 25));

bt1.setBounds(new Rectangle(340, 20, 120, 25));

bt2.setBounds(new Rectangle(40, 330, 70, 25));

tf4.setBounds(new Rectangle(130, 330, 70, 25));

add(l1);

add(l2);

add(l3);

add(tf1);

add(tf2);

add(tf3);

add(tf4);

add(bt1);

add(bt2);

add(ta);

setVisible(true);

}

public static void main(String []args) {

SwingTest3 sTest3 = new SwingTest3();

}

}

class GetAction implements ActionListener{

public void actionPerformed(ActionEvent e){

String t1 = SwingTest3.tf1.getText();

String t2 = SwingTest3.tf2.getText();

String t3 = SwingTest3.tf3.getText();

int T1 = Integer.parseInt(t1);

int T2 = Integer.parseInt(t2);

int T3= Integer.parseInt(t3);

boolean flag;

int a ,b ,c;

a = T1;

b = T2;

c = T3;

int count =0;

for(int i = a;i<=b;i++){

flag = true;

for(int j = 2 ; j<=i/2 ; j++){

if(i%j == 0) {

flag =false;

break;}

}

if(flag){

String string = String.valueOf(i);

SwingTest3.ta.append(string+” “);

count++;

SwingTest3.num++;

if(count%c == 0)

SwingTest3.ta.append(“\n”);

}

}

String s = String.valueOf(SwingTest3.num);

SwingTest3.tf4.setText(s);

}

}