Here you can find the source of abbreviate(final TimeUnit unit)
public static String abbreviate(final TimeUnit unit)
//package com.java2s; /*//from w w w . j a va 2 s . co m * Copyright (C) 2008 The Guava Authors * * 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. */ import java.util.concurrent.TimeUnit; public class Main { public static String abbreviate(final TimeUnit unit) { switch (unit) { case NANOSECONDS: return "ns"; case MICROSECONDS: return "\u03bcs"; // ?s case MILLISECONDS: return "ms"; case SECONDS: return "s"; case MINUTES: return "min"; case HOURS: return "h"; case DAYS: return "d"; default: throw new AssertionError(); } } }