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class A
{
public static void main(String... ar)
{
int[] array; //declaration of a 1-D array
}
}
class A
{
public static void main(String... ar)
{
int[] array= new int[4]; //Array object is constructed on the heap with size to hold 4 int values.
}
}
Array type | Default value |
---|---|
char | '\u0000' |
byte | 0 |
int | 0 |
float | 0.0 |
double | 0.0 | Object | null |
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class A
{
public static void main(String... ar)
{
int[] oneDA= new int[4]; //Array object is constructed on the heap when its size is mentioned at its creation.
oneDA[0]=10; //storing 10 at index 0 in array
oneDA[1]=20; //storing 20 at index 1 in array
oneDA[2]=30; //storing 30 at index 2 in array
oneDA[3]=40; //storing 40 at index 3 in array
}
}
System.out.println(arr[2]); //Reading 2nd index of this array gives us a value, 30
class A
{
public static void main(String... ar)
{
char[] array= new char[4]; //Array object is constructed on the heap when its size is mentioned at its creation.
array[0]='a';
array[1]='b';;
array[2]='c';
array[3]='d';
for(int i=0; i<array.length; i++) //accessing array elements using length variable in for-loop
{
System.out.println(array[i]);
}
}
}
a
b
c
d
class A
{
public static void main(String... ar)
{
A[] array= new A[4]; //Array holding 4 object references of type, A.
A ob1= new A();
A ob2= new A();
A ob3= new A();
A ob4= new A();
array[0] = ob1;
array[1] = ob2;
array[2] = ob3;
array[3] = ob4;
System.out.println("Length of an array "+ array.length); // length of an array.
for(int i=0; i<array.length; i++) //accessing array elements using length variable in for-loop
{
System.out.println(array[i]);
}
}
}
Length of an array 4
A@70dea4e
A@5c647e05
A@33909752
A@55f96302
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