Question

java inputdialog 用法和判断方法

Answer 1

类似这样
import javax.swing.JOptionPane;

public class Test {

public static void main(String[] args) {

String content = JOptionPane.showInputDialog("Please input some value");

if(content == null || content.trim().equals("")){
JOptionPane.showMessageDialog(null, "Invalid value!(Empty valu inputed)");
}

}
}