sushu.java

重新上传java素数发生器,原先的压缩包打不开,使用java语言在netbean环境开发,产生一定范围内的素数

/*
 * Sushu.java
 *
 * Created on 2006年11月8日, 下午9:15
 */

/**
 *
 * @author  lzp
 */
import javax.swing.JOptionPane;
public class Sushu extends javax.swing.JFrame {
    
    /** Creates new form Sushu */
    public Sushu() { 
         this.setTitle("素数发生器:");
        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.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        tf = new javax.swing.JTextField();
        bt1 = new javax.swing.JButton();
        bt2 = new javax.swing.JButton();
        bt3 = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        ta = new javax.swing.JTextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jLabel1.setText("\u8bf7\u8f93\u5165\u4e00\u4e2a\u81ea\u7136\u6570\uff1a");

        bt1.setText("\u8fd0\u7b97");
        bt1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bt1ActionPerformed(evt);
            }
        });

        bt2.setText("\u9000\u51fa");
        bt2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bt2ActionPerformed(evt);
            }
        });

        bt3.setText("\u9879\u76ee\u8bbe\u8ba1\u8005");
        bt3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bt3ActionPerformed(evt);
            }
        });

        ta.setColumns(20);
        ta.setRows(5);
        jScrollPane1.setViewportView(ta);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 491, Short.MAX_VALUE)
                    .add(layout.createSequentialGroup()
                        .add(jLabel1)
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                        .add(tf, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 132, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                        .add(bt1)
                        .add(14, 14, 14)
                        .add(bt2)
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 20, Short.MAX_VALUE)
                        .add(bt3)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(bt3)
                    .add(bt1)
                    .add(tf, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                    .add(bt2))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 18, Short.MAX_VALUE)
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 259, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void bt3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bt3ActionPerformed
// TODO 将在此处添加您的处理代码  
            ta.append("B04040526     张宁宁");
            ta.append("\n\n");
            ta.append("B04040529     杜冠军");
            ta.append("\n\n");
            ta.append("B04040518     刘尊沛"); 
            ta.append("\n\n");
            JOptionPane.showMessageDialog(null,"\nB04040526  张宁宁\nB04040529  杜冠军\nB04040518  刘尊沛","设计者:",1); 
    }//GEN-LAST:event_bt3ActionPerformed

    private void bt2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bt2ActionPerformed
// TODO 将在此处添加您的处理代码：
         System.exit(0);
    }//GEN-LAST:event_bt2ActionPerformed

    private void bt1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bt1ActionPerformed
// TODO 将在此处添加您的处理代码：
         try{
             String s=tf.getText();
             int x=Integer.parseInt(s);
             if(x<2)
             { 
                ta.setText("   请输入一个大于1的自然数\n");
             }
             else
             { 
                int i,k,z=0;
		long N=x;
                boolean bl;
               ta.setText("从1到 "+x+"的素数为:\n");
                for (i=2;i<=N;i++)
                {
                        bl=true;
                        for (k=2;k<=Math.sqrt(i);++k)
                        {
                                if (i%k==0)
                                   {
                                              bl=false;
                                       break;
                                   }
                                else
                                   bl=true;
                        }
                        if (bl)
                        {
                            z=z+1;
                         ta.append("  "+i+ "  ");
                            if (z%10==0)
                           ta.append("\n");
                        }
                
                }
             }
           }catch(Exception e){
            ta.setText("请先输入一个自然数！\n");
                }
         ta.append("\n\n");
    }//GEN-LAST:event_bt1ActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Sushu().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton bt1;
    private javax.swing.JButton bt2;
    private javax.swing.JButton bt3;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea ta;
    private javax.swing.JTextField tf;
    // 变量声明结束//GEN-END:variables
    
}