先举三个栗子: 1. public static void main(String[] args) { Double d = new Double(123.56); byte b = d.byteValue(); System.out.println(b); } 输出结果:123 2. public static void main(String[] args) { Double d = new Double(456.56); byte b = d.byteValue(); System.out
代码: using System; using System.Windows.Forms; namespace CheckInput { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Sure_button_Click(object sender, EventArgs e) { if (CheckIsLegal() && CheckIsNull()) {
需要导入的jar包 具体实现 public class ColumnToString { public static void main(String[] args) { new ColumnToString().read(); } public void read() { File file = new File("Excel 文件位置(C:\\myExcel.xlsx)"); InputStream inputStream = null; Workbook workbook = n