How to set the default value of java array

1. Default values ​​of different arrays

For arrays defined by int type, the initial default value is 0.

Array defined by String type, the default value is null.

The result of defining a char type array using the UTF8 character set is 0.

Array defined by double type, the default value is 0.0.

Array defined by float type, the default value is 0.0.

Array defined by boolean type, the default value is false.

2. Example

(1) int array:

int[] ia = new int[2];
System.out.println(ia[0]);
System.out.println(ia[1]);

Output

0
0

(2) boolean array

boolean[] ba = new boolean[2];
System.out.println(ba[0]);
System.out.println(ba[1]);

Output:

false
false

When some friends were learning arrays, they discovered that arrays also have default values. However, there are many types of arrays in Java, so the default values ​​​​of different types of arrays are also different.

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