[Java]printStackTrace 활용 예

■ printStackTrace 활용 예

import java.util.Scanner;

class AgeInputException extends Exception {

public AgeInputException() {

super("유효하지 않은 나이가 입력되었습니다.");

}

}

class NameLengthException extends Exception {

String wrongName;

public NameLengthException(String name) {

super("잘못된 이름이 삽입되었습니다.");

wrongName = name;

}

public void showWrongName() {

System.out.println("잘못 입력된 이름 : " + wrongName);

}

}

class PersonalInfo {

String name;

int age;

public PersonalInfo(String name, int age) {

this.name = name;

this.age = age;

}

public void showPersonalInfo() {

System.out.println("이름 : " + name);

System.out.println("나이 : " + age);

}

}

public class PrintStackTrace {

public static Scanner keyboard = new Scanner(System.in);

public static void main(String[] args) {

try {

PersonalInfo readInfo = readPersonalInfo();

readInfo.showPersonalInfo();

} catch(AgeInputException e) {

e.printStackTrace();

} catch(NameLengthException e) {

e.showWrongName();

e.printStackTrace();

}

}

public static PersonalInfo readPersonalInfo() throws AgeInputException, NameLengthException {

String name = readName();

int age = readAge();

PersonalInfo pInfo = new PersonalInfo(name, age);

return pInfo;

}

public static String readName() throws NameLengthException {

System.out.println("이름 입력 : ");

String name = keyboard.nextLine();

if(name.length() < 2)

throw new NameLengthException(name);

return name;

}

public static int readAge() throws AgeInputException {

System.out.println("나이 입력 : ");

int age = keyboard.nextInt();

if(age < 0)

throw new AgeInputException();

return age;

}

}