1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 package org.apache.bcel; 20 21 public class NanoTimer { 22 23 private long time = 0; 24 25 public NanoTimer start() { 26 time -= System.nanoTime(); 27 return this; 28 } 29 30 public void stop() { 31 time += System.nanoTime(); 32 } 33 34 public void subtract(final NanoTimer o) { 35 time -= o.time; 36 } 37 38 public void reset() { 39 time = 0; 40 } 41 42 /** 43 * May ony be called after stop has been called as many times as start. 44 */ 45 @Override 46 public String toString() { 47 return ((double) time / 1000000000) + " s"; 48 } 49 50 51 52 } 53
