Java - placeholder on textfield

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情深已故
情深已故 2020-11-29 08:50

I\'m trying to create a GUI with Swing. My problem is, I have a textfield, but I want it to have a \"placeholder\" (like in html). I read here and there that it can be done

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  •  悲&欢浪女
    2020-11-29 09:09

    Try this.

    private void txtUserNameFocusGained(java.awt.event.FocusEvent evt) {                                        
        String username = txtUserName.getText();
        if(username.equals("User Name")){
            txtUserName.setCaretPosition(0);
        }
    
    }                                       
    
    private void txtUserNameFocusLost(java.awt.event.FocusEvent evt) {                                      
        String username = txtUserName.getText();
        if(username.equals("")){
            txtUserName.setForeground(new java.awt.Color(86, 86, 86));
            txtUserName.setCaretPosition(0);
            txtUserName.setText("User Name");
        }
    }                                     
    
    private void txtUserNameKeyPressed(java.awt.event.KeyEvent evt) {                                       
        String username = txtUserName.getText();
        if(username.equals("User Name")){
            txtUserName.setForeground(new java.awt.Color(0, 0, 0));
            txtUserName.setText(null);
            txtUserName.setCaretPosition(0);
        }
    }
    

    Be adviced, the name of the text field is "txtUserName". You can see the output as like this.

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