Home >Java >javaTutorial >How to use JavaGUI menu bar, text, password and text field components
Create menu bar JMenuBar
Create menu JMenu
Create menu item JMenuItem
Summary: menu item dependent menu, menu dependent menu Bar
Create menu bar
Create menu
Create menu item
MenuAdd a menu item
Menu barAdd a menu
Example:
import javax.swing.*; import java.awt.*; public class Jmenu { public static void main(String[] args){ JFrame jf=new JFrame("JMenu"); jf.setBounds(400,300,400,200); jf.setLayout(new FlowLayout(FlowLayout.CENTER)); JMenuBar bar=new JMenuBar(); JMenu menu=new JMenu("菜单一"); JMenuItem item=new JMenuItem("选项1"); JMenuItem item2=new JMenuItem("选项2"); JMenuItem item3=new JMenuItem("选项3"); menu.add(item); menu.add(item2); menu.add(item3); bar.add(menu); jf.add(bar); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }
Create a menu bar
Create multiple menus
Create multiple menu items
MenuAdd multiple menu items
Add menu to menu bar
import javax.swing.*; import java.awt.*; public class Jmenu { public static void main(String[] args){ JFrame jf=new JFrame("JMenu"); jf.setBounds(400,300,400,200); jf.setLayout(new FlowLayout(FlowLayout.CENTER)); JMenuBar bar=new JMenuBar(); JMenu menu=new JMenu("菜单一"); JMenu menu2=new JMenu("菜单二"); JMenu menu3=new JMenu("菜单三"); JMenuItem item=new JMenuItem("选项1"); JMenuItem item2=new JMenuItem("选项2"); JMenuItem item3=new JMenuItem("选项3"); JMenuItem item4=new JMenuItem("选项4"); JMenuItem item5=new JMenuItem("选项5"); JMenuItem item6=new JMenuItem("选项6"); menu.add(item); menu.add(item2); menu.add(item3); menu2.add(item4); menu3.add(item5); menu3.add(item6); bar.add(menu); bar.add(menu2); bar.add(menu3); jf.add(bar); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }
Example:
##2. Textnew JTextField();new JTextField(String text);//Specify the default textExample:new JTextField(int fieldWidth);//Specify the length of the text boxnew JTextField(String text,int fieldWidth);//Specify the default text and specify the length of the text boxnew JTextField( Documented docModel,String text, int fieldWidth);//Specify text box mode, specify default text, specify text box length
import javax.swing.*; import java.awt.*; public class JtextField { public static void main(String[] args){ JFrame jf=new JFrame("JTextFiled"); jf.setLayout(new FlowLayout(FlowLayout.CENTER)); jf.setBounds(400,300,400,300); JTextField text=new JTextField("请输入",20); jf.add(text); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }3. Password boxClass: JPasswordFieldConstructor:
new JPasswordField();new JPasswordField(String text);/ /Specify the default textnew JPasswordField(int fieldWidth);//Specify the length of the text boxnew JPasswordField(String text,int fieldWidth);//Specify the default text and specify the length of the text boxnew JPasswordField(Documented docModel,String text, int fieldWidth);//Specify text box mode, specify default text, specify text box lengthOther common methods:
import javax.swing.*; import java.awt.*; public class JpasswordField{ public static void main(String[] args){ JFrame jf=new JFrame("JTextFiled"); jf.setLayout(new FlowLayout(FlowLayout.LEFT)); jf.setBounds(400,300,400,300); JLabel jl=new JLabel("密码"); JPasswordField password=new JPasswordField("",20); jf.add(jl); jf.add(password); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }
##4. Text area
Constructor:
new JTextArea();new JTextArea(String text);//Specify Default text
new JTextArea(int rows,int cols);//Specify rows and columns
new JTextFieldArea(Documented docModel);//Specify text box mode
new JTextArea( Documented docModel,String text, int rows,int cols);//Specify text box mode, specify default text, specify rows and columns
Other common methods:
import javax.swing.*; import java.awt.*; public class JtextArea { public static void main(String[] args) { JFrame jf = new JFrame("JTextArea"); jf.setLayout(new FlowLayout(FlowLayout.LEFT)); jf.setBounds(400, 300, 400, 300); JTextArea area=new JTextArea(20,10); area.setLineWrap(true); jf.add(area); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }
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