If语句在NetBeans中无法正常运行

Question

我在下面提到了这段代码：

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    // TODO add your handling code here:
    Integer intNumber = (Integer)jComboBox1.getSelectedIndex();
    String text = null;

    if (intNumber <= 3) {
        text = "Less than or equal to three";
    } else if (intNumber > 3) {
        text = "Bigger than three";
    }
    jLabel1.setText(text);
}                                        

但如果我在Netbeans中运行此代码并在Combobox中选择4（大于3），则jLabel1会打印出“小于或等于3”，即使它显然更大。有人能解释一下原因吗？

Answer 1

试试这段代码。您使用getSelectedIndex()代替getSelectedItem()。

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    // TODO add your handling code here:
    Integer intNumber = (Integer)jComboBox1.getSelectedItem();
    String text = null;

    if (intNumber <= 3) {
        text = "Less than or equal to three";
    } else if (intNumber > 3) {
        text = "Bigger than three";
    }
    jLabel1.setText(text);
}