try-catch

title: try-catch in Java description: Exception handle karna try-catch se

Basic Syntax

java exampleWoHoTech

try {
    // Code jo exception throw kar sakta hai
    int result = 10 / 0;
} catch (ArithmeticException e) {
    System.out.println("Error: " + e.getMessage());
} finally {
    System.out.println("Finally hamesha chalta hai");
}

Multiple catch blocks

try { String s = null; int[] arr = new int[5]; s.length(); // NullPointerException arr[10] = 1; // ArrayIndexOutOfBoundsException } catch (NullPointerException e) { System.out.println("Null pointer: " + e.getMessage()); } catch (ArrayIndexOutOfBoundsException e) { System.out.println("Array error: " + e.getMessage()); } catch (Exception e) { System.out.println("General error: " + e.getMessage()); }

Multi-catch (Java 7+)

java exampleWoHoTech

try {
    // code
} catch (NullPointerException | ArrayIndexOutOfBoundsException e) {
    System.out.println("Either null or array error: " + e.getMessage());
}

try-with-resources (Java 7+)

java exampleWoHoTech

try (FileReader fr = new FileReader("file.txt");
     BufferedReader br = new BufferedReader(fr)) {
    String line = br.readLine();
    System.out.println(line);
} catch (IOException e) {
    e.printStackTrace();
}
// Resources automatically close hote hain

Exception Methods

java exampleWoHoTech

catch (Exception e) {
    e.getMessage()     // Error message
    e.toString()       // Class + message
    e.printStackTrace() // Full stack trace
    e.getCause()       // Root cause
}

title: try-catch in Java description: Exception handle karna try-catch se

Basic Syntax

java exampleWoHoTech

try {
    // Code jo exception throw kar sakta hai
    int result = 10 / 0;
} catch (ArithmeticException e) {
    System.out.println("Error: " + e.getMessage());
} finally {
    System.out.println("Finally hamesha chalta hai");
}

Multiple catch blocks

Multi-catch (Java 7+)

java exampleWoHoTech

try {
    // code
} catch (NullPointerException | ArrayIndexOutOfBoundsException e) {
    System.out.println("Either null or array error: " + e.getMessage());
}

try-with-resources (Java 7+)

java exampleWoHoTech

try (FileReader fr = new FileReader("file.txt");
     BufferedReader br = new BufferedReader(fr)) {
    String line = br.readLine();
    System.out.println(line);
} catch (IOException e) {
    e.printStackTrace();
}
// Resources automatically close hote hain

Exception Methods

java exampleWoHoTech

catch (Exception e) {
    e.getMessage()     // Error message
    e.toString()       // Class + message
    e.printStackTrace() // Full stack trace
    e.getCause()       // Root cause
}

try-catch

Basic Syntax

Multiple catch blocks

Multi-catch (Java 7+)

try-with-resources (Java 7+)

Exception Methods

Continue learning this concept

try-catch

Basic Syntax

Multiple catch blocks

Multi-catch (Java 7+)

try-with-resources (Java 7+)

Exception Methods

Continue learning this concept