Java 7 features

 

• Strings in switch statement.   

  
public class StringSwitchCase {
	public static void main(String args) {
		String day = "SAT";
		switch (day) {   // switch on String selector
		   case "MON": System.out.println("Monday"); break;
		   case "TUE": System.out.println("Tuesday"); break;
		   case "WED": System.out.println("Wednesday"); break;
		   case "THU": System.out.println("Thursday"); break;
		   case "FRI": System.out.println("Friday"); break;
		   case "SAT": System.out.println("Saturday"); break;
		   case "SUN": System.out.println("Sunday"); break;
		   default: System.out.println("Invalid");
		}
	}
}
  

• Binary integer literals.

    You can exprese liternal value with 0b for (int,long and so). You are also permitted to use underscore (_) to break the digits to improve the readability 

  
public class BinaryIntegerLiteralTest {
	public static void main(String[] args) {
		int int2 = 0b01_1010;
		System.out.println(int2);
	}
}
  

 

• Allowing underscores in numeric literals.

• Catching multiple exception types and rethrowing exceptions with improved type checking.
• Automatic resource management in try-statement.
• Improved type inference for generic instance creation, aka the diamond operator <>.
• Simplified varargs method declaration.