Java Event Monitoring Mechanism Explanation

Add listeners to components

Define a class that inherits ActionListener

pubulic class ButListener implements ActionListener{ 
Public void actionPerformed(ActionEvent e){ 
}} 

Add an action listener method to a button

ButListener but = new ButListen(); 
jbu.addActionListener(but); 

Add a monitoring mechanism and then create a window in the listener ButListener time processing method to get the window after clicking the button.

Relistener

Define an JTextField variable, jt, to hold the text st box object passed in

public JTextField jt; 
public JTextField jt2; 
public void actionPerformed(ActionEvent e) {
// Gets the string inside the text box 
  String name = jt.getText();
  String mima = jt2.getText();
if ( " 123 " .equals(name)&& " 321 " .equals(mima)) { ... . 
}else( ... ){ ... } 
}

summary