java - 输入错误编号时出错

Question

有人可以解释一下我的问题吗？当我尝试输入逗号数字时，我总是得到

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1.2"

我的代码:

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
     // TODO add your handling code here:
    String showInputDialog = JOptionPane.showInputDialog("Enter Line: ");
    int liningg = Integer.parseInt(showInputDialog);
    double volume = liningg*liningg*liningg;

    JOptionPane.showMessageDialog(null, "Last result are: "+volume );

}

Answer 1

NumberFormatException For input string: "1.2"

“1.2”不是整数，因此无法将其解析为整数值。

也许你想要:

double liningg = Double.parseDouble(showInputDialog);