Исключения. Стандартные исключения презентация

main(String[] args) {

String[] staff = {"Harry Hacker", "Tonny Tester", "Eve Engineer", null, "Carl Cracker"};

for(String name : staff){
System.out.println("Hello " + name.toUpperCase());
}

System.out.println();
System.out.println("Total staff members: " + staff.length);
}
}

Hello HARRY HACKER
Hello TONNY TESTER
Hello EVE ENGINEER
Exception in thread "main" java.lang.NullPointerException
at standard.NullPointerExceptionDemo.main(NullPointerExceptionDemo.java:10)

{

Object obj = new Integer(10);
System.out.println("Casting Integer to String.....");
String str =(String) obj;
System.out.println("This line will never be printed");
}
}

Casting Integer to String.....
Exception in thread "main" java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at standard.ClassCastExceptionDemo.main(ClassCastExceptionDemo.java:9)

main(String[] args) {

Set greetings = Collections.singleton("Hello");

for(String greeting : greetings){
System.out.println(greeting);
}

greetings.add("Hi");
greetings.add("Good morning");

for(String greeting : greetings){
System.out.println(greeting);
}
}
}

Hello
Exception in thread "main" java.lang.UnsupportedOperationException
at java.util.AbstractCollection.add(Unknown Source)
at standard.OperationNotSupportedExceptionDemo.main(OperationNotSupportedExceptionDemo.java:16)

{

Set staff = new TreeSet();

staff.add("Harry Hacker");
staff.add("Tonny Tester");
staff.add("Eve Engineer");
staff.add("Carl Cracker");

Iterator iter = staff.iterator();

System.out.println(iter.next());
System.out.println(iter.next());
iter.remove();
iter.remove();
}
}

Carl Cracker
Eve Engineer
Exception in thread "main" java.lang.IllegalStateException
at java.util.TreeMap$PrivateEntryIterator.remove(TreeMap.java:1119)
at standard.IllegalStateExceptionDemo.main(IllegalStateExceptionDemo.java:25)

main(String[] args) {

int[] anArray = { 0, 100, 200, 300, 400, 500, 600, 700, 800, 900 };

for (int i = 0; i <= 10; i++) {

System.out.println(anArray[i]);
}

System.out.println();
System.out.println("Array length is: " + anArray.length);
}
}

0
100
200
300
400
500
600
700
800
900
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
at standard.IndexOutOfBoundsExceptionDemo.main(IndexOutOfBoundsExceptionDemo.java:11)

{

SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
long now = System.currentTimeMillis();

System.out.println("Current date and time: " + sdf.format(now));

sdf = new SimpleDateFormat("Hello World: MM/dd/yyyy HH:mm:ss");
now = System.currentTimeMillis();

System.out.println("Current date and time: " + sdf.format(now));

}
}

Current date and time: 04/21/2013 19:51:03
Exception in thread "main" java.lang.IllegalArgumentException: Illegal pattern character 'e'
at java.text.SimpleDateFormat.compile(Unknown Source)
at java.text.SimpleDateFormat.initialize(Unknown Source)
at java.text.SimpleDateFormat.(Unknown Source)
at java.text.SimpleDateFormat.(Unknown Source)
at standard.IllegalArgumentExceptionDemo.main(IllegalArgumentExceptionDemo.java:16)

main(String[] args) {

String[] numbers = {"9", "25", "14", "11", "33", "hello world", "45"};

int total = 0;

for (String number : numbers) {
total += Integer.parseInt(number);
System.out.println("Total so far: " + total);
}
}
}

Total so far: 9
Total so far: 34
Total so far: 48
Total so far: 59
Total so far: 92
Exception in thread "main" java.lang.NumberFormatException: For input string: "hello world"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at standard.NumberFormatExceptionDemo.main(NumberFormatExceptionDemo.java:12)

java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at standard.ClassNotFoundExceptionDemo.main(ClassNotFoundExceptionDemo.java:13)

public class ClassNotFoundExceptionDemo {

public static void main(String args[]) {
try {
URLClassLoader loader = new URLClassLoader(new URL[] { new URL(
"file://C:/CL/ClassNotFoundException/") });
loader.loadClass("DoesNotExist");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
}

}

}

BufferedReader br = null;

try {

String sCurrentLine;
br = new BufferedReader(new FileReader("I:\\DoesNotExist.txt"));

while ((sCurrentLine = br.readLine()) != null) {
System.out.println(sCurrentLine);
}

} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {

if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

}

Файл не найден

java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(FileInputStream.java:120)
at java.io.FileInputStream.(FileInputStream.java:79)
at java.io.FileReader.(FileReader.java:41)
at standard.FileNotFoundExceptionDemo.main(FileNotFoundExceptionDemo.java:17)

static final String USER = "sa";
static final String PASS = "";

public static void main(String[] args) throws SQLException {

Connection connection = null;

try {

System.out.println("Connecting to a selected database...");
connection = DriverManager.getConnection(DB_URL, USER, PASS);
System.out.println("Connected to the database");

} catch (SQLException e) {
e.printStackTrace();
} finally {

if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}

Ошибка доступа к СУБД

found.
at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.newSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.handleDBNotFound(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection40.(Unknown Source)
at org.apache.derby.jdbc.Driver40.getNewEmbedConnection(Unknown Source)
at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
at org.apache.derby.jdbc.Driver20.connect(Unknown Source)
at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at standard.SQLExceptionDemo.main(SQLExceptionDemo.java:21)
Caused by: java.sql.SQLException: Database 'c:/otherDirectory/myDB' not found.
at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
... 15 more

MalformedURLExceptionDemo {

public static void main(String[] args) {

try {

URL url = new URL("gttp://www.google.com:80/");

BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));

String line;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
in.close();

} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

}

}

main(String[] args) {

Student harry = new Student("Harry Hacker", "Applied Mathematics");
System.out.println(harry);
}
}

class Student {

private String name;
private String major;

public Student(String name, String major) {
this.name = name;
this.major = major;
}

public String toString() {
return "Student [name=" + name + ", major=" + major + "]";
}

}

label.
Volume Serial Number is 58B9-DDFE

Directory of F:\spaces\javase-space\06.Exceptions\bin\standard

01/21/2014 04:23 PM .
01/21/2014 04:23 PM ..
01/21/2014 04:20 PM 747 NoClassDefFoundErrorDemo.class
01/21/2014 04:20 PM 745 Student.class
2 File(s) 1,492 bytes
2 Dir(s) 40,497,762,304 bytes free

F:\spaces\javase-space\06.Exceptions\bin>java standard/NoClassDefFoundErrorDemo
Student [name=Harry Hacker, major=Applied Mathematics]

Student.class

no label.
Volume Serial Number is 58B9-DDFE

Directory of F:\spaces\javase-space\06.Exceptions\bin\standard

01/21/2014 04:27 PM .
01/21/2014 04:27 PM ..
01/21/2014 04:20 PM 747 NoClassDefFoundErrorDemo.class
1 File(s) 747 bytes
2 Dir(s) 40,497,766,400 bytes free

F:\spaces\javase-space\06.Exceptions\bin>java standard/NoClassDefFoundErrorDemo
Exception in thread "main" java.lang.NoClassDefFoundError: standard/Student
at standard.NoClassDefFoundErrorDemo.main(NoClassDefFoundErrorDemo.java:6)
Caused by: java.lang.ClassNotFoundException: standard.Student
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 1 more

F:\spaces\javase-space\06.Exceptions\bin>

java.lang.NoClassDefFoundError

standard\Student.class

standard/Student

System.out.println("Hello World!");
RecursiveSayHello();
}

public static void main(String[] args) {
RecursiveSayHello();
}
}

Hello World!
Hello World!
Hello World!
Hello World!
Exception in thread "main" java.lang.StackOverflowError
at sun.nio.cs.SingleByte.withResult(Unknown Source)
at sun.nio.cs.SingleByte.access$000(Unknown Source)
at sun.nio.cs.SingleByte$Encoder.encodeArrayLoop(Unknown Source)
at sun.nio.cs.SingleByte$Encoder.encodeLoop(Unknown Source)
at java.nio.charset.CharsetEncoder.encode(Unknown Source)
at sun.nio.cs.StreamEncoder.implWrite(Unknown Source)
at sun.nio.cs.StreamEncoder.write(Unknown Source)
at java.io.OutputStreamWriter.write(Unknown Source)
at java.io.BufferedWriter.flushBuffer(Unknown Source)
at java.io.PrintStream.write(Unknown Source)
at java.io.PrintStream.print(Unknown Source)
at java.io.PrintStream.println(Unknown Source)
at standard.StackOverflowErrorDemo.RecursiveSayHello(StackOverflowErrorDemo.java:7)
at standard.StackOverflowErrorDemo.RecursiveSayHello(StackOverflowErrorDemo.java:8)

args) {

int[][] bigArray = new int[10000][];

for (int i = 0; i < bigArray.length; i++) {

bigArray[i] = new int[1024*256];
System.out.println(i + " MB used");
}
}
}

239 MB used
240 MB used
241 MB used
242 MB used
243 MB used
244 MB used
245 MB used
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at standard.OutOfMemoryErrorDemo.main(OutOfMemoryErrorDemo.java:11)