How to remove decimals from a float result?

android floating-point integer

14,415

Solution 1

Try This it may be help to you

String.format("%.0f",floatvalue);

Float.parseFloat(String.format("%.0f",floatvalue))

Solution 2

It looks like you are unnecessarily complicating things.

When you know for sure that you do not want the decimal component of your number you should just use the integer or long types. Unless you have a valid reason or specific bias against the int datatype.

14,415

Author by

George Lungu

Updated on June 04, 2022

Comments

George Lungu almost 2 years

in my app i calculate the CPU usage and i get the result in % but sometimes the result is too big 20.234234234234 My question is, how can i completely remove the result numbers after the "."?
And can i do this without changing float to integer?

Here is my code:

    private float readCpuUsage() {
    try {
        RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");
        String load = reader.readLine();

        String[] toks = load.split(" ");

        long idle1 = Long.parseLong(toks[5]);
        long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3])
                + Long.parseLong(toks[4]) + Long.parseLong(toks[6])
                + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        try {
            Thread.sleep(360);
        } catch (Exception e) {
        }

        reader.seek(0);
        load = reader.readLine();
        reader.close();

        toks = load.split(" ");

        long idle2 = Long.parseLong(toks[5]);
        long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3])
                + Long.parseLong(toks[4]) + Long.parseLong(toks[6])
                + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

        return (float) (cpu2 - cpu1) / ((cpu2 + idle2) - (cpu1 + idle1));

    } catch (IOException ex) {
        ex.printStackTrace();
    }

    return 0;
}

To print the result i just throw:

      textview.setText((readCpuUsage() * 100) + "%");

where readCpuUsage() is the result and to transform it to % i multiply it with 100
This is how i did it:

    float xxz=readCpuUsage()*100;
    textview.setText(String.format("%.0f",xxz) + "%");

George Lungu almost 8 years

Thanks Raut, but i want to remove completely the decimals.
George Lungu almost 8 years

This gives me the result 0
George Lungu almost 8 years

float x = 100.5; it says: Required float, found double.
nlogn almost 8 years

float will always have the decimal, better change it to integer
George Lungu almost 8 years

ok then, how can i do this? because when i change it to integer, the result is always 0
Er. Kaushik Kajavadara almost 8 years

sorry, just replace float x = 100.5; with float x = 100.5f;
George Lungu almost 8 years

float xxz=readCpuUsage()*100; textview.setText(String.format("%.0f",xxz) + "%");
nlogn almost 8 years

float flt=20.234234234234; println(((int)Math.floor(flt))+""); It gives result 20