CODEWITHSUNDEEP
javaswingnetbeansitemlistener
user5372775
user5372775

Reputation: 25

ItemListener getitem() doesn't return only name

I'm using an ItemListener for my radiobuttons. I saw a lot of ItemListener functions, but mine seems to work differently.

...        jUserButton2.addItemListener(ffs);
}

private ItemListener ffs = new ItemListener(){
@Override
public void itemStateChanged(ItemEvent e) {
    if (e.getStateChange() == ItemEvent.SELECTED) {
        String user = e.getItem().toString();
        System.out.println(user);
    }
}
};

The value it returns is "javax.swing.JRadioButton[User,445,453,49x18,alignmentX=0.0,alignmentY=0.5,border=javax.swing.plaf.synth.SynthBorder@1f2f60d,flags=288,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],paintBorder=false,paintFocus=true,pressedIcon=,rolloverEnabled=true,rolloverIcon=,rolloverSelectedIcon=,selectedIcon=,text=User]"

Shouldn't it return just the value? (in this case is "User")

Upvotes: 1

Views: 1061

Answers (2)

user4668606
user4668606

Reputation:

As the docs say:

public Object getItem()
Returns the item affected by the event.

The item affected is a JRadioButton (which is also what the console prints). This is logical correct, since the item affected is that button. Simply change the code to this:

String user = ((JRadioButton) e.getItem()).getName();
System.out.println(user);

Upvotes: 1

Robin
Robin

Reputation: 36621

JRadioButton is a JToggleButton. If you look into the source code, you will see that the event is fired using the protected fireItemStateChange method. For example, in the javax.swing.JToggleButton.ToggleButtonModel#setSelected method you find the following code:

// Send ItemEvent
fireItemStateChanged(
  new ItemEvent(this,
  ItemEvent.ITEM_STATE_CHANGED,
  this,
  this.isSelected() ?  ItemEvent.SELECTED : ItemEvent.DESELECTED));

This means that when you receive the ItemEvent and call getItem, you will receive the JRadioButton (the this in the above code (third constructor argument)).

Calling toString on the radio button gives you exactly what you are seeing.

You can fix this by casting e.getItem() to a JRadioButton and call getText() (or whatever info you want to retrieve) on it

Upvotes: 1

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