throw aur throws

title: throw aur throws in Java description: throw aur throws keywords ka use

throw — Exception Throw karna

Manually exception throw karna.

java exampleWoHoTech

void validateAge(int age) {
    if (age < 0) {
        throw new IllegalArgumentException("Age negative nahi ho sakti: " + age);
    }
    if (age > 150) {
        throw new IllegalArgumentException("Age valid nahi hai: " + age);
    }
    System.out.println("Valid age: " + age);
}

throws — Exception Declare karna

Method signature mein declare karo ki method kaunsi exceptions throw kar sakta hai.

java exampleWoHoTech

// Caller ko batao ki IOException aane wali hai
void readFile(String filename) throws IOException {
    FileReader fr = new FileReader(filename);
    // ...
}

// Call karte time handle karo
try {
    readFile("data.txt");
} catch (IOException e) {
    System.out.println("File error: " + e.getMessage());
}

Multiple throws

java exampleWoHoTech

void process() throws IOException, SQLException {
    // IO ya DB dono mein se koi bhi exception
}

throw vs throws

	throw	throws
--	--	--
Use	Exception object throw karna	Method declaration mein
Keyword	`throw exceptionObject;`	`throws ExceptionClass`
Count	Ek baar ek exception	Multiple exceptions

Checked Exception propagate karna

java exampleWoHoTech

void level3() throws IOException { throw new IOException("Error"); }
void level2() throws IOException { level3(); }
void level1() {
    try { level2(); }
    catch (IOException e) { System.out.println("Caught: " + e.getMessage()); }
}

title: throw aur throws in Java description: throw aur throws keywords ka use

throw — Exception Throw karna

Manually exception throw karna.

java exampleWoHoTech

void validateAge(int age) {
    if (age < 0) {
        throw new IllegalArgumentException("Age negative nahi ho sakti: " + age);
    }
    if (age > 150) {
        throw new IllegalArgumentException("Age valid nahi hai: " + age);
    }
    System.out.println("Valid age: " + age);
}

throws — Exception Declare karna

Method signature mein declare karo ki method kaunsi exceptions throw kar sakta hai.

java exampleWoHoTech

// Caller ko batao ki IOException aane wali hai
void readFile(String filename) throws IOException {
    FileReader fr = new FileReader(filename);
    // ...
}

// Call karte time handle karo
try {
    readFile("data.txt");
} catch (IOException e) {
    System.out.println("File error: " + e.getMessage());
}

Multiple throws

java exampleWoHoTech

void process() throws IOException, SQLException {
    // IO ya DB dono mein se koi bhi exception
}

throw vs throws

	throw	throws
--	--	--
Use	Exception object throw karna	Method declaration mein
Keyword	`throw exceptionObject;`	`throws ExceptionClass`
Count	Ek baar ek exception	Multiple exceptions

Checked Exception propagate karna

java exampleWoHoTech

void level3() throws IOException { throw new IOException("Error"); }
void level2() throws IOException { level3(); }
void level1() {
    try { level2(); }
    catch (IOException e) { System.out.println("Caught: " + e.getMessage()); }
}

throw aur throws

throw — Exception Throw karna

throws — Exception Declare karna

Multiple throws

throw vs throws

Checked Exception propagate karna

Continue learning this concept

throw aur throws

throw — Exception Throw karna

throws — Exception Declare karna

Multiple throws

throw vs throws

Checked Exception propagate karna

Continue learning this concept