Map<String, List<String>> employeeRecords = new HashMap<String, List<String>>();
List<Integer> primes = new ArrayList<Integer>();

Map<String, List<String>> employeeRecords = new HashMap<>();
List<Integer> primes = new ArrayList<>();  

switch (day) {
	case "NEW":
		System.out.println("Order is in NEW state");
		break;
	case "CANCELED":
		System.out.println("Order is Cancelled");
		break;
	case "REPLACE":
		System.out.println("Order is replaced successfully");
		break;
	case "FILLED":
		System.out.println("Order is filled");
		break;
	default:
	System.out.println("Invalid"); 
}

public static void main(String args[]) {
	FileInputStream fin = null;
	BufferedReader br = null;
	
	try {
		fin = new FileInputStream("info.xml");
		br = new BufferedReader(new InputStreamReader(fin));
		if (br.ready()) {
			String line1 = br.readLine();
			System.out.println(line1);
		}
	} catch (FileNotFoundException ex) {
		System.out.println("Info.xml is not found");
	} catch (IOException ex) {
		System.out.println("Can't read the file");
	} finally {
		try {
			if (fin != null)
				fin.close();
			if (br != null)
				br.close();
		} catch (IOException ie) {
			System.out.println("Failed to close files");
		}
	}
}  

public static void main(String args[]) {
	try (FileInputStream fin = new FileInputStream("info.xml");
		BufferedReader br = new BufferedReader(new InputStreamReader(fin));) {
		if (br.ready()) {
			String line1 = br.readLine();
			System.out.println(line1);
		}
	} catch (FileNotFoundException ex) {
		System.out.println("Info.xml is not found");
	} catch (IOException ex) {
		System.out.println("Can't read the file");
	}
}

int billion = 1_000_000_000; // 10^9
long creditCardNumber = 1234_4567_8901_2345L; //16 digit number
long ssn = 777_99_8888L;
double pi = 3.1415_9265;
float pif = 3.14_15_92_65f;

double pi = 3._1415_9265; // 소수점 뒤에 _ 붙일 경우
long creditcardNum = 1234_4567_8901_2345_L; // 숫자 끝에 _ 붙일 경우
long ssn = _777_99_8888L; // 숫자 시작에 _ 붙일 경우

try {
	//...... 
} catch(ClassNotFoundException ex) {
	ex.printStackTrace(); 
} catch(SQLException ex) {
	ex.printStackTrace(); 
}

try {
	//......
} catch (ClassNotFoundException | SQLException ex) {
	ex.printStackTrace();
}


//////////////////////////////////////////////////////////////////////////////
//Multi-Catch 구문 사용시 Exception들이 하위클래스 관계라면 컴파일 에러가 발생한다 //
//////////////////////////////////////////////////////////////////////////////
try {
    //...... }
catch (FileNotFoundException | IOException ex) {
    ex.printStackTrace(); 
}

Alternatives in a multi-catch statement cannot be related by sub classing, it will throw error at compile time :
java.io.FileNotFoundException is a subclass of alternative java.io.IOException at Test.main

public void obscure() throws Exception {
	try {
		new FileInputStream("abc.txt").read();
		new SimpleDateFormat("ddMMyyyy").parse("12-03-2014");
	} catch (Exception ex) {
		System.out.println("Caught exception: " + ex.getMessage());
		throw ex;
	}
}  

public void precise() throws ParseException, IOException {
	try {
		new FileInputStream("abc.txt").read();
		new SimpleDateFormat("ddMMyyyy").parse("12-03-2014");
	} catch (Exception ex) {
		System.out.println("Caught exception: " + ex.getMessage());
		throw ex;
	}
}