scouter.util.FormatUtil Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package scouter.util;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import scouter.lang.value.DecimalValue;
public class FormatUtil {
public static String print(Object o, String format) {
if (o == null)
return "";
if (format == null)
return o.toString();
try {
if (o instanceof java.util.Date) {
return new SimpleDateFormat(format).format((Date) o);
} else if (o instanceof Number || o instanceof BigDecimal) {
return new DecimalFormat(format).format(o);
} else if (o instanceof DecimalValue) {
return new DecimalFormat(format).format(new Long(((DecimalValue) o).value));
}
} catch (Throwable e) {
}
return o.toString();
}
private static String[] unit = { "B", "K", "M", "G", "T", "P" };
public static String printMem(double mem) {
int x = 0;
for (x = 0; mem >= 1024 && x < unit.length; x++) {
mem /= 1024;
}
if (x == 0)
return mem + unit[0];
return print(mem, "#,##0.0") + unit[x];
}
public static void main(String[] args) {
System.out.println(printMem(1024L*1024*1024L));
}
}