Groovy - java 多个同时转换

Question

I would like to know if someone has tips on how to convert KB's variables all at the same time.

I'm reaching a Linux remote machine and retrieving at the same time 3 variables:

They are: Memory RAM total, Memory RAM used, and Memory RAM available. The variables are received in KB's "format" but I need to display them in Gigabytes.(See the example below)

I can convert them all but only one at a time and the idea is to convert them all at the same time.

Memory RAM total: 5000000      // KB
Memory RAM used: 2000000       // KB
Memory RAM available: 3000000  //KB

This is what I did so far to convert only the Memory RAM total variable.

def size = 5000000 // Memory that can be converted KB MB GB AND TERABYTE

String hrSize = ""

try {
    int k = size
    double m = size / 1024 // bytes
    double g = size / 1048576 // bytes
    double t = size / 1073741824 // bytes

    DecimalFormat dec = new DecimalFormat("0.00")

    if (k > 1) {
      //If the size is more than 1kb but less than 1024 bytes, the output will be KiloBytes
        hrSize = dec.format(k).concat("KB")
    }
    if (m > 1) {
      //If the size is more than 1kb but less than 1048576 bytes, the output will be Megabytes
        hrSize = dec.format(m).concat("MB")
    }
    if (g > 1) {
      //If the size is more than 1kb and more than 1048576 but less than 1073741824 bytes, the output will be Gigabytes
        hrSize = dec.format(g).concat("GB")
    }
    if (t > 1) {
      //If the size is more than 1073741824 bytes the output will be Terabytes.
        hrSize = dec.format(t).concat("TB")
    }
} catch (Exception e) {
    println("This program ran into a problem, root cause" + e)

}
println(" The total memory from this computer is: " + hrSize)

Output:

The total memory from this computer is: 4,77GB

What I'm looking for?

The total memory from this computer is: 4,77GB
The total free from this computer is: 1,91GB
The total Available from this computer is: 2,86GB

Any documentation or tips?

Answer 1

You can improve the function by making it a loop

def prettySize(float size) {
    def label = ['b', 'KB', 'MB', 'GB', 'TB'].find {
        if( size < 1024 ) {
            true
        } else {
            size /= 1024 
            false
        }
    }
    "${new java.text.DecimalFormat('0.##').format(size)}$label"
}

println("The total memory from this computer is: ${prettySize(size)}")

Prints:

The total memory from this computer is: 4.77MB