Java NetBeans将值传递给JFrame会产生编译错误

Question

There are two jFrames.

1. FirstPage
2. SecondPage

There is a button on FirstPage . When user clicks it, I need to open SecondPage .

This is the code in FirstPage :

private void btn_testActionPerformed(java.awt.event.ActionEvent evt) {                                         

    String testName="Damith";
    SecondFrame win1=new SecondFrame(testName);
    win1.setVisible(true);
} 

This is how I modify SecondPage :

public SecondFrame(String anyname) {
    initComponents();

}

When I run the project it says:

One or more projects were complied with error

However, when I click "Run Anyway" it works as I expected.

So, why they said "One or more projects were complied with error"?

Answer 1

I see that you modified the default constructor that NetBeans generated for you to:

public SecondFrame(String anyname) {
    initComponents();

}

This means that if you replaced (instead of adding) the above with the default constructor that NetBeans generated for you, you caused a compilation error, as the auto-generated code from NetBeans invokes the default constructor that it generated, not the one that you explicitly created:

/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
    public void run() {
        new SecondFrame().setVisible(true);
    }
});

So, if the above assumption is correct (and it's the only one, one could make, with the details you provided), the following line is the error's cause:

new SecondFrame().setVisible(true);

If not, just hover your mouse over the red sign of the exact line on your editor to let the compiler inform you about the specific error.