在NetBeans中if语句不能正常工作

Question

我得到了下面的代码:

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);
}                                        

但是，如果我在Netbeans中运行此代码并在组合框中选择4(大于3)，则jLabel1打印出"小于或等于3"，即使它明显更大。有人能解释一下原因吗?

Answer 1

试试下面的代码。您使用getSelectedIndex()而不是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);
}