public static void main(String []args){
System.out.println(f(7));
}
public static long f(int index){
if(index == 1 || index == 2){
return 1;
}
long f1= 1L;
long f2 = 1L;
long f = 0;
for(int i=0;i<index-2;i++){
f = f1+f2;
f1 = f2;
f2 = f;
}
return f;
}
}
鍏朵簩錛?
//package demo;
//鎵撳嵃鏂愭嘗閭ｅ鏁板垪
public class Fib{
public static void main(String[] args){
int x = 0;
int y = 1;
System.out.print(x+" ");
for(int i=1;i<=20;i++){
System.out.print(y+" ");
y=x+y;
x=y-x;
}
}
}
鍏朵笁錛?br />
//姹傚嚭絎琻涓暟鏄嚑
public class Fib{
public static void main(String args[]){
System.out.println(f(6));
}
public static int f(int n){
if(n == 1 || n == 2){
return 1;
}else{
return f(n-1) + f(n-2);
}
}
}
]]>
* LoginJDialog.java
*
* Created on 2009騫?鏈?7鏃? 涓嬪崍2:35
*/
package mydb;
import javax.swing.*;
import java.sql.*;
/**
*
* @author soft
*/
class LoginJDialog extends javax.swing.JDialog {
/** Creates new form LoginJDialog */
private Connection cn;
public Connection getCn() {
return cn;
}
private void quit() {
int tag = JOptionPane.showConfirmDialog(null, "鎮ㄧ‘瀹氶鍑虹▼搴忓悧?", "淇℃伅", JOptionPane.YES_NO_OPTION);
if(tag==JOptionPane.YES_OPTION){
System.exit(1);
}
}
private void getdata() {
String uid = jTextField1.getText();
String pwd = jPasswordField1.getText();
int tag = 0;
try{
Class.forName("com.mysql.jdbc.Driver");
}
catch(ClassNotFoundException e){
tag = 1;
}
try{
cn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mytestdb",uid,pwd);
}
catch(SQLException e){
tag = 1;
}
if(tag == 0) setVisible(false);
else JOptionPane.showMessageDialog(this,"鏁版嵁搴撻敊璇?","閿欒",1);
}
public LoginJDialog(java.awt.Frame parent, boolean modal) {
super(parent, modal);
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=" 鐢熸垚鐨勪唬鐮?">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jPasswordField1 = new javax.swing.JPasswordField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent evt) {
formWindowClosing(evt);
}
});
jLabel1.setText("User:");
jLabel2.setText("password:");
jButton1.setText("Cancel");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("Confirm");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(34, 34, 34)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGap(16, 16, 16)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jPasswordField1, 0, 0, Short.MAX_VALUE)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 178, Short.MAX_VALUE)))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jButton1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 126, Short.MAX_VALUE)
.addComponent(jButton2)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(29, 29, 29)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 51, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jButton2))
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO 灝嗗湪姝ゅ娣誨姞鎮ㄧ殑澶勭悊浠ｇ爜錛?br />
getdata();
}
private void formWindowClosing(java.awt.event.WindowEvent evt) {
// TODO 灝嗗湪姝ゅ娣誨姞鎮ㄧ殑澶勭悊浠ｇ爜錛?br />
quit();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO 灝嗗湪姝ゅ娣誨姞鎮ㄧ殑澶勭悊浠ｇ爜錛?br />
quit();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new LoginJDialog(new javax.swing.JFrame(), true).setVisible(true);
}
});
}
// 鍙橀噺澹版槑 - 涓嶈繘琛屼慨鏀?nbsp;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPasswordField jPasswordField1;
private javax.swing.JTextField jTextField1;
// 鍙橀噺澹版槑緇撴潫
}
]]>
]]>