Variasi Exception

Mungkin rada basi, tapi mudah-mudahan bisa sharing sedikit. Salah satu syntax JAVA yang sering dipake try-catch beserta exception. Nah, karena kebiasaan pake IDE eclipse, kalo masuk exception, pasti pake e.printStackTrace(). Pas ujian sertifikasi, paling sering soal exception muncul saya gambarin dalam beberapa skenario :

Skenario 1

Throw exception dan catcher menggunakan super class nya.

public class SampleMain {   public void sampleException() { throw new RuntimeException("runtime"); }   public void sampleNumberException() { throw new NumberFormatException("number format"); }   public static void main(String args[]) { try { SampleMain sm = new SampleMain(); sm.sampleException(); sm.sampleNumberException(); } catch (/* skenario 1 */ Exception e) { System.out.println(e); } } }

public class SampleMain { public void sampleException() { throw new RuntimeException("runtime"); } public void sampleNumberException() { throw new NumberFormatException("number format"); } public static void main(String args[]) { try { SampleMain sm = new SampleMain(); sm.sampleException(); sm.sampleNumberException(); } catch (/* skenario 1 */ Exception e) { System.out.println(e); } } }

Output

java.lang.RuntimeException: runtime

Skenario 2

Throw exception dan catcher menggunakan expception yang berbeda.

public class SampleMain {   public void sampleException() { throw new RuntimeException("runtime"); }   public void sampleNumberException() { throw new NumberFormatException("number format"); }   public static void main(String args[]) { try { SampleMain sm = new SampleMain(); sm.sampleException(); sm.sampleNumberException(); } catch (/* skenario 2 */ NumberFormatException e) { System.out.println(e); } } }

public class SampleMain { public void sampleException() { throw new RuntimeException("runtime"); } public void sampleNumberException() { throw new NumberFormatException("number format"); } public static void main(String args[]) { try { SampleMain sm = new SampleMain(); sm.sampleException(); sm.sampleNumberException(); } catch (/* skenario 2 */ NumberFormatException e) { System.out.println(e); } } }

Output

Exception in thread "main" java.lang.RuntimeException: runtime
	at SampleMain.sampleException(SampleMain.java:4)
	at SampleMain.main(SampleMain.java:14)

CMIIW .

Marifnst, 2014-07-16