By GokiSoft.com|
19:57 15/07/2021|
Java Basic
[Share Code] Tìm hiểu Exception + Time + Base64 + Java Swing - Lập trình Java
#MainFrame.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson07;
import javax.swing.table.DefaultTableModel;
/**
*
* @author Diep.Tran
*/
public class MainFrame extends javax.swing.JFrame {
DefaultTableModel tableModel;
/**
* Creates new form MainFrame
*/
public MainFrame() {
initComponents();
tableModel = (DefaultTableModel) jTable1.getModel();
}
/**
* 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.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
fullnameTxt = new javax.swing.JTextField();
emailTxt = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
addressTxt = new javax.swing.JTextField();
jLabel3 = new javax.swing.JLabel();
saveBtn = new javax.swing.JButton();
resetBtn = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("NHAP THONG TIN SINH VIEN");
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("FORM NHAP"));
jLabel1.setText("TEN: ");
jLabel2.setText("EMAIL:");
jLabel3.setText("ADDRESS: ");
saveBtn.setText("SAVE");
saveBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
saveBtnActionPerformed(evt);
}
});
resetBtn.setText("RESET");
resetBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
resetBtnActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(fullnameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 340, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(jLabel2)
.addGap(54, 54, 54)
.addComponent(emailTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 340, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addComponent(jLabel3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(saveBtn)
.addGap(18, 18, 18)
.addComponent(resetBtn))
.addComponent(addressTxt, javax.swing.GroupLayout.PREFERRED_SIZE, 340, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addContainerGap(32, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(fullnameTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(emailTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(addressTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(29, 29, 29)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(saveBtn)
.addComponent(resetBtn))
.addContainerGap(14, Short.MAX_VALUE))
);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"STT", "TEN", "EMAIL", "ADDRESS"
}
) {
boolean[] canEdit = new boolean [] {
false, false, false, false
};
public boolean isCellEditable(int rowIndex, int columnIndex) {
return canEdit [columnIndex];
}
});
jScrollPane1.setViewportView(jTable1);
if (jTable1.getColumnModel().getColumnCount() > 0) {
jTable1.getColumnModel().getColumn(0).setResizable(false);
jTable1.getColumnModel().getColumn(1).setResizable(false);
jTable1.getColumnModel().getColumn(3).setResizable(false);
}
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 148, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>//GEN-END:initComponents
private void saveBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_saveBtnActionPerformed
// TODO add your handling code here:
String fullname = fullnameTxt.getText();
String email = emailTxt.getText();
String address = addressTxt.getText();
System.out.println("fullname = " + fullname + ", email = " + email + ", address = " + address);
tableModel.addRow(new Object[] {tableModel.getRowCount() + 1, fullname, email, address});
}//GEN-LAST:event_saveBtnActionPerformed
private void resetBtnActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_resetBtnActionPerformed
// TODO add your handling code here:
fullnameTxt.setText("");
emailTxt.setText("");
addressTxt.setText("");
}//GEN-LAST:event_resetBtnActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MainFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JTextField addressTxt;
private javax.swing.JTextField emailTxt;
private javax.swing.JTextField fullnameTxt;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
private javax.swing.JButton resetBtn;
private javax.swing.JButton saveBtn;
// End of variables declaration//GEN-END:variables
}
#MainFrame.form
<?xml version="1.0" encoding="UTF-8" ?>
<Form version="1.3" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JFrameFormInfo">
<Properties>
<Property name="defaultCloseOperation" type="int" value="3"/>
<Property name="title" type="java.lang.String" value="NHAP THONG TIN SINH VIEN"/>
</Properties>
<SyntheticProperties>
<SyntheticProperty name="formSizePolicy" type="int" value="1"/>
<SyntheticProperty name="generateCenter" type="boolean" value="false"/>
</SyntheticProperties>
<AuxValues>
<AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="0"/>
<AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
<AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
<AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
<AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
<AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
</AuxValues>
<Layout>
<DimensionLayout dim="0">
<Group type="103" groupAlignment="0" attributes="0">
<Group type="102" alignment="0" attributes="0">
<EmptySpace max="-2" attributes="0"/>
<Group type="103" groupAlignment="0" attributes="0">
<Component id="jScrollPane1" max="32767" attributes="0"/>
<Component id="jPanel1" max="32767" attributes="0"/>
</Group>
<EmptySpace max="-2" attributes="0"/>
</Group>
</Group>
</DimensionLayout>
<DimensionLayout dim="1">
<Group type="103" groupAlignment="0" attributes="0">
<Group type="102" alignment="0" attributes="0">
<EmptySpace max="-2" attributes="0"/>
<Component id="jPanel1" min="-2" max="-2" attributes="0"/>
<EmptySpace max="-2" attributes="0"/>
<Component id="jScrollPane1" min="-2" pref="148" max="-2" attributes="0"/>
<EmptySpace max="32767" attributes="0"/>
</Group>
</Group>
</DimensionLayout>
</Layout>
<SubComponents>
<Container class="javax.swing.JPanel" name="jPanel1">
<Properties>
<Property name="border" type="javax.swing.border.Border" editor="org.netbeans.modules.form.editors2.BorderEditor">
<Border info="org.netbeans.modules.form.compat2.border.TitledBorderInfo">
<TitledBorder title="FORM NHAP"/>
</Border>
</Property>
</Properties>
<Layout>
<DimensionLayout dim="0">
<Group type="103" groupAlignment="0" attributes="0">
<Group type="102" alignment="0" attributes="0">
<EmptySpace min="-2" pref="18" max="-2" attributes="0"/>
<Group type="103" groupAlignment="0" max="-2" attributes="0">
<Group type="102" alignment="1" attributes="0">
<Component id="jLabel1" min="-2" max="-2" attributes="0"/>
<EmptySpace max="32767" attributes="0"/>
<Component id="fullnameTxt" min="-2" pref="340" max="-2" attributes="0"/>
</Group>
<Group type="102" alignment="1" attributes="0">
<Component id="jLabel2" min="-2" max="-2" attributes="0"/>
<EmptySpace min="-2" pref="54" max="-2" attributes="0"/>
<Component id="emailTxt" min="-2" pref="340" max="-2" attributes="0"/>
</Group>
<Group type="102" alignment="1" attributes="0">
<Component id="jLabel3" min="-2" max="-2" attributes="0"/>
<EmptySpace max="32767" attributes="0"/>
<Group type="103" groupAlignment="0" attributes="0">
<Group type="102" attributes="0">
<Component id="saveBtn" min="-2" max="-2" attributes="0"/>
<EmptySpace type="separate" max="-2" attributes="0"/>
<Component id="resetBtn" min="-2" max="-2" attributes="0"/>
</Group>
<Component id="addressTxt" min="-2" pref="340" max="-2" attributes="0"/>
</Group>
</Group>
</Group>
<EmptySpace pref="32" max="32767" attributes="0"/>
</Group>
</Group>
</DimensionLayout>
<DimensionLayout dim="1">
<Group type="103" groupAlignment="0" attributes="0">
<Group type="102" alignment="0" attributes="0">
<EmptySpace max="-2" attributes="0"/>
<Group type="103" groupAlignment="3" attributes="0">
<Component id="jLabel1" alignment="3" min="-2" max="-2" attributes="0"/>
<Component id="fullnameTxt" alignment="3" min="-2" max="-2" attributes="0"/>
</Group>
<EmptySpace type="separate" max="-2" attributes="0"/>
<Group type="103" groupAlignment="3" attributes="0">
<Component id="jLabel2" alignment="3" min="-2" max="-2" attributes="0"/>
<Component id="emailTxt" alignment="3" min="-2" max="-2" attributes="0"/>
</Group>
<EmptySpace type="separate" max="-2" attributes="0"/>
<Group type="103" groupAlignment="3" attributes="0">
<Component id="jLabel3" alignment="3" min="-2" max="-2" attributes="0"/>
<Component id="addressTxt" alignment="3" min="-2" max="-2" attributes="0"/>
</Group>
<EmptySpace min="-2" pref="29" max="-2" attributes="0"/>
<Group type="103" groupAlignment="3" attributes="0">
<Component id="saveBtn" alignment="3" min="-2" max="-2" attributes="0"/>
<Component id="resetBtn" alignment="3" min="-2" max="-2" attributes="0"/>
</Group>
<EmptySpace pref="14" max="32767" attributes="0"/>
</Group>
</Group>
</DimensionLayout>
</Layout>
<SubComponents>
<Component class="javax.swing.JLabel" name="jLabel1">
<Properties>
<Property name="text" type="java.lang.String" value="TEN: "/>
</Properties>
</Component>
<Component class="javax.swing.JTextField" name="fullnameTxt">
</Component>
<Component class="javax.swing.JTextField" name="emailTxt">
</Component>
<Component class="javax.swing.JLabel" name="jLabel2">
<Properties>
<Property name="text" type="java.lang.String" value="EMAIL:"/>
</Properties>
</Component>
<Component class="javax.swing.JTextField" name="addressTxt">
</Component>
<Component class="javax.swing.JLabel" name="jLabel3">
<Properties>
<Property name="text" type="java.lang.String" value="ADDRESS: "/>
</Properties>
</Component>
<Component class="javax.swing.JButton" name="saveBtn">
<Properties>
<Property name="text" type="java.lang.String" value="SAVE"/>
</Properties>
<Events>
<EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="saveBtnActionPerformed"/>
</Events>
</Component>
<Component class="javax.swing.JButton" name="resetBtn">
<Properties>
<Property name="text" type="java.lang.String" value="RESET"/>
</Properties>
<Events>
<EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="resetBtnActionPerformed"/>
</Events>
</Component>
</SubComponents>
</Container>
<Container class="javax.swing.JScrollPane" name="jScrollPane1">
<AuxValues>
<AuxValue name="autoScrollPane" type="java.lang.Boolean" value="true"/>
</AuxValues>
<Layout class="org.netbeans.modules.form.compat2.layouts.support.JScrollPaneSupportLayout"/>
<SubComponents>
<Component class="javax.swing.JTable" name="jTable1">
<Properties>
<Property name="model" type="javax.swing.table.TableModel" editor="org.netbeans.modules.form.editors2.TableModelEditor">
<Table columnCount="4" rowCount="0">
<Column editable="false" title="STT" type="java.lang.Object"/>
<Column editable="false" title="TEN" type="java.lang.Object"/>
<Column editable="false" title="EMAIL" type="java.lang.Object"/>
<Column editable="false" title="ADDRESS" type="java.lang.Object"/>
</Table>
</Property>
<Property name="columnModel" type="javax.swing.table.TableColumnModel" editor="org.netbeans.modules.form.editors2.TableColumnModelEditor">
<TableColumnModel selectionModel="0">
<Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="false">
<Title/>
<Editor/>
<Renderer/>
</Column>
<Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="false">
<Title/>
<Editor/>
<Renderer/>
</Column>
<Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="true">
<Title/>
<Editor/>
<Renderer/>
</Column>
<Column maxWidth="-1" minWidth="-1" prefWidth="-1" resizable="false">
<Title/>
<Editor/>
<Renderer/>
</Column>
</TableColumnModel>
</Property>
<Property name="tableHeader" type="javax.swing.table.JTableHeader" editor="org.netbeans.modules.form.editors2.JTableHeaderEditor">
<TableHeader reorderingAllowed="true" resizingAllowed="true"/>
</Property>
</Properties>
</Component>
</SubComponents>
</Container>
</SubComponents>
</Form>
#Main.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson07;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author Diep.Tran
*/
public class Main {
public static void main(String[] args) {
//Logic -> error
//Chia cho 0, Out of index
Scanner scan = new Scanner(System.in);
System.out.println("Nhap x = ");
int x = scan.nextInt();
System.out.println("Nhap y = ");
int y = scan.nextInt();
//fix 1 -> luon luon ap dung
/**if(y == 0) {
System.out.println("Ko dc phep chia cho 0");
} else {
int s = x / y;
System.out.println("s = " + s);
}*/
//fix 2 -> bat error bang khoi code try catch finally
/**
try {
//Noi dat code -> nghi van dan toi exception (crash) chuong trinh
int s = x / y;
System.out.println("s = " + s);
int[] t = new int[3];
t[0] = 9;
t[6] = 10;
} catch(ArithmeticException e) {
// e.printStackTrace();
System.out.println("Loi phep toan ...");
} catch(ArrayIndexOutOfBoundsException e) {
// e.printStackTrace();
System.out.println("Out of index ...");
} catch(Exception e) {
//Khi code -> exception -> thuc thi khoi code o day
System.out.println("Exception ...");
} finally {
//Code -> luon dc goi sau khi ket thuc try va catch
System.out.println("Finally ...");
}
*/
try {
float s = Calculator.chia(x, y);
System.out.println("s = " + s);
} catch (CalculatorException ex) {
ex.showMsg();
}
try {
float s2 = Calculator.chia2(x, y);
System.out.println("s = " + s2);
} catch (Exception ex) {
ex.printStackTrace();
}
//Keys datetime
//convert datetime to string java -> Hien thi + insert/update database
//convert string to datetime java -> database -> lap trinh -> compare
//add n hours to a date in java
//https://stackoverflow.com/questions/3581258/adding-n-hours-to-a-date-in-java
}
}
#CalculatorException.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson07;
/**
*
* @author Diep.Tran
*/
public class CalculatorException extends Exception{
float x, y;
public CalculatorException() {
}
public CalculatorException(float x, float y, String msg) {
super(msg);
this.x = x;
this.y = y;
}
public void showMsg() {
System.out.println("x = " + x + ", y = " + y + ", msg = " + getMessage());
}
}
#Calculator.java
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package lesson07;
/**
*
* @author Diep.Tran
*/
public class Calculator {
public static float cong(float x, float y) {
return x + y;
}
public static float tru(float x, float y) {
return x - y;
}
public static float nhan(float x, float y) {
return x * y;
}
public static float chia(float x, float y) throws CalculatorException {
if(y == 0) {
// System.out.println("Khong dc phep chia cho 0");
// return 0;
//Nen lam cho chuong trinh bi crash -> exception
throw new CalculatorException(x, y, "Devide by Zero");
}
return x / y;
}
public static float chia2(float x, float y) {
if(y == 0) {
throw new ArithmeticException("Devide by Zero!!!");
}
return x / y;
}
public static float chia3(float x, float y) throws Exception {
if(y == 0) {
throw new Exception("Devide by Zero!!!");
}
return x / y;
}
}
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