如何让InputDialog框连续接受两个值

package javaapplication4;
import javax.swing.*;

public class JavaApplication4 {


    public static void main(String[] args) {
        // TODO code application logic here
        int num1;

        num1 = Integer.parseInt(JOptionPane.showInputDialog("Please enter a value"));
            if(num1<50 && num1>100)
                System.out.println("value is correct");
            else 
                System.out.println("value is incorrect");
    }
}
package javaapplication4;
import javax.swing.*;