JOptionPane&&Exception的使用
import java.util.Scanner; import javax.swing.JOptionPane; class AgeException extends Exception{ AgeException(){ JOptionPane.showMessageDialog(null, "您输入了非法年龄","输入错误",JOptionPane.WARNING_MESSAGE); } } public class Student_Age { private int age = 1; public void setAge(int age) throws AgeException{ if(age < 0 || age > 160){ throw new AgeException(); } else{ this.age = age; } } public static void main(String[] args) { Scanner cin = new Scanner(System.in); int x = cin.nextInt(); Student_Age student_Age = new Student_Age(); try { student_Age.setAge(x); } catch (AgeException e) { } } }
Keep it simple!
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