问错误while语句

EN

import javax.swing.JOptionPane;
import java.lang.NumberFormatException;

public class Calc_Test {
public static void main(String[] args) throws NumberFormatException{
    while(true){
        String INT= JOptionPane.showInputDialog("Enter a number here: ");
        int Int = Integer.parseInt(INT);
        JOptionPane.showConfirmDialog(null, Int);
        break;
        }
    }
}

import javax.swing.JOptionPane;

public class Calc_Test {
public static void main(String[] args){
    while(true){
        String inputInt= JOptionPane.showInputDialog("Enter a number here: ");
        if(inputInt.matches("-?\\d+")){
            JOptionPane.showConfirmDialog(null, "\"" + inputInt + "\"" + " is a number");
            break;
            }
            JOptionPane.showConfirmDialog(null, "\"" + inputInt + "\"" + " is not a number. Therefore, " + "\"" + inputInt + "\"" + " could not be parsed. Try again.");
        }       
    }
}