Event snooping in the Java Gui design pattern

• Button tap to listen

Trigger a listener event by clicking the button

1Button_20 =NewJButton ("20");//Create a Button object Button_202Button_20.addactionlistener (NewActionListener () {//To Add a button listener event3              Public voidactionperformed (ActionEvent e) {4                 if(Textfield_6.gettext (). Equals ("")) {5Textfield_6.settext ("20"); //Add content to the target text box 6}Else{7                     intsum = Integer.parseint (Textfield_6.gettext ()) +20;8 textfield_6.settext (string.valueof (sum));9                 }Ten             } One});

　　

• Mouse click to listen

Trigger a listener event by clicking the left mouse button

　　

Combobox.addmouselistener (NewMouseadapter () {//Add mouse listener events for our elements             Public voidmouseclicked (MouseEvent e) {//left mouse button click (target table)                           intR= Table_2.getselectedrow ();//get the row where the cell is located              intC= Table_2.getselectedcolumn ();//get the column where the cell is locatedObject value=Table_2.getvalueat (R, c); //get the value of the clicked cell                      intA = Integer.parseint (String.valueof (Table_2.getvalueat (R, 3))); intb = Integer.parseint (String.valueof (Table_2.getvalueat (R, 2))); intres = A *b;//int a = (int) table_2.getvalueat (r, 3) * (int) table_2.getvalueat (r, 2);Table_2.setvalueat (Res, R, 4); //Implement the functionality we need (modify parameters for another cell in a different column of your peers)System.out.println (info);                                 }        }); 

Event snooping in the Java Gui design pattern