Finding out the semantic differences between different parts of the code can be too easy. Check out the README.md for this Gist to find out the back story behind this Gist and "How are array object created when using a bracketed list" :)

README.md

In this gist I quickly showcase the differences between the following three code snippets:
int[] array = new int[] {10, 20, 30};
int[] array = {10, 20, 30};
int[] array = new int[3]; array[0] = 10; array[1] = 20; array[3] = 30;

I do this by disassembling the class files for those code snippets (which i obtain after compiling them). This arose due to a question that was asked on stackoverflow about their difference: http://stackoverflow.com/questions/17245450/how-are-array-object-created-when-using-a-bracketed-list

I also do this for:

String str = new String("Hello");```

ArrayTest.bytecode

public class ArrayTest extends java.lang.Object{
public ArrayTest();
  Code:
   0:   aload_0
   1:   invokespecial   #1; //Method java/lang/Object."<init>":()V
   4:   return

public static void main1();
  Code:
   0:   iconst_3
   1:   newarray int
   3:   astore_0
   4:   aload_0
   5:   iconst_0
   6:   bipush  10
   8:   iastore
   9:   aload_0
   10:  iconst_1
   11:  bipush  20
   13:  iastore
   14:  aload_0
   15:  iconst_3
   16:  bipush  30
   18:  iastore
   19:  return

public static void main2();
  Code:
   0:   iconst_3
   1:   newarray int
   3:   dup
   4:   iconst_0
   5:   bipush  10
   7:   iastore
   8:   dup
   9:   iconst_1
   10:  bipush  20
   12:  iastore
   13:  dup
   14:  iconst_2
   15:  bipush  30
   17:  iastore
   18:  astore_0
   19:  return

public static void main3();
  Code:
   0:   iconst_3
   1:   newarray int
   3:   dup
   4:   iconst_0
   5:   bipush  10
   7:   iastore
   8:   dup
   9:   iconst_1
   10:  bipush  20
   12:  iastore
   13:  dup
   14:  iconst_2
   15:  bipush  30
   17:  iastore
   18:  astore_0
   19:  return
}

ArrayTest.java

public class ArrayTest {
    public static void main1() {
        int[] array = new int[3]; array[0] = 10; array[1] = 20; array[3] = 30;
    }

    public static void main2() {
        int[] array = new int[] {10, 20, 30};
    }

    public static void main3() {
        int[] array = {10, 20, 30};
    }
}

Test.bytecode

public static void main4();  
  Code:  
   0:	ldc	#2; //String Hello  
   2:	astore_0  
   3:	return  
  
public static void main5();  
  Code:  
   0:	new	#3; //class java/lang/String  
   3:	dup  
   4:	ldc	#2; //String Hello  
   6:	invokespecial	#4; //Method java/lang/String."<init>":(Ljava/lang/String;)V  
   9:	astore_0  
   10:	return

Test.java

class Test {	
        public static void main4() {
		String str = "Hello"; // no 'new' statement here
	}

	public static void main5() {
		String str = new String("Hello");
	}
}