To get a square root of a number in Java, do this:

`Math.sqrt(number)`

.Here's how you do it:

```
double squareRoot = Math.sqrt(4);
System.out.println(squareRoot); // 2.0
```

+

To get a square root of a number in Java, do this:

`Math.sqrt(number)`

.Here's how you do it:

```
double squareRoot = Math.sqrt(4);
System.out.println(squareRoot); // 2.0
```