FormatHelper.java

package org.gridkit.jvmtool.gcflow;

public class FormatHelper {

	public static String toMemoryUnits(double value) {
		if (value == 0) {
			return "0";
		}
		if (value < (10l << 10)) {
			String val = String.format("%.2f", value).trim();
			if (val.endsWith(".00")) {
				val = val.substring(0, val.length() - 3);
			}
			else if (val.indexOf('.') > 0 && val.endsWith("0")) {
				val = val.substring(0, val.length() - 1);
			}
			return val;
		}
		else if (value < (1l << 20)) {
			return String.format("%5.4gKi", value / (1l << 10)).trim();
		}
		else if (value < (1l << 30)) {
			return String.format("%5.4gMi", value / (1l << 20)).trim();
		}
		else if (value < (1l << 40)) {
			return String.format("%5.4gGi", value / (1l << 30)).trim();
		}
		else {
			return String.format("%dGi", (long)(value / (1l << 30))).trim();
		}
	}

	public static String toSeconds(double value) {
		return String.format("%6.3fB", value);
	}
	
}