Here you can find the source of isLeftMouseButton(MouseEvent anEvent)
public static boolean isLeftMouseButton(MouseEvent anEvent)
//package com.java2s; /*/*ww w . ja va 2s. c om*/ * Copyright 2000-2014 JetBrains s.r.o. * * 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.awt.event.InputEvent; import java.awt.event.MouseEvent; public class Main { /** * Replaces SwingUtilities#isLeftMouseButton() for consistency with other button-related methods * * @see javax.swing.SwingUtilities#isLeftMouseButton(java.awt.event.MouseEvent) */ public static boolean isLeftMouseButton(MouseEvent anEvent) { return (anEvent.getModifiersEx() & InputEvent.BUTTON1_DOWN_MASK) > 0; } }