Write something to text field when any item from combobox is selected [duplicate]

Question

This question already has answers here:

How do I compare strings in Java? (23 answers)

Closed 8 years ago.

I want to write something to a text field when I select any item from combo box. But I couldn't do this.

Java code:

comboBox.addItemListener(new ItemListener() {
    public void itemStateChanged(ItemEvent arg0) {
            if(comboBox.getSelectedItem()=="apple") {
                tfbf.setText("apple selected");
            }
        }
    });

Answer 1

As you don't provide any valid example . You compare object observational equality with equals(..) not with ==.

"apple".equals(comboBox.getSelectedItem())

Read more How do I compare strings in Java?

== tests for reference equality.

.equals() tests for value equality.

Answer 2

comboBox.addItemListener(new ItemListener() {
    public void itemStateChanged(ItemEvent arg0)
    {
        if(comboBox.getSelectedItem()=="apple")
        {
              tfbf.setText("apple selected");
        }
    }
});

Is probably better written as:

comboBox.addItemListener(new ItemListener() {
    public void itemStateChanged(ItemEvent arg0)
    {
        tfbf.setText(comboBox.getSelectedItem() + " selected");
    }
});