Here you can find the source of captureCurrentMonitor()
public static BufferedImage captureCurrentMonitor()
//package com.java2s; /*/*from w ww . j ava 2 s .c om*/ * This file is part of alta-commons. * * Copyright (c) 2012, alta189 <http://github.com/alta189/alta-commons/> * alta-commons is licensed under the GNU Lesser General Public License. * * alta-commons is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * alta-commons is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.AWTException; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.MouseInfo; import java.awt.Point; import java.awt.Rectangle; import java.awt.Robot; import java.awt.image.BufferedImage; public class Main { public static BufferedImage captureCurrentMonitor() { Point cursor = MouseInfo.getPointerInfo().getLocation(); GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice[] screens = ge.getScreenDevices(); Robot robot = null; Rectangle bounds = null; for (GraphicsDevice screen : screens) { bounds = screen.getDefaultConfiguration().getBounds(); if (bounds.contains(cursor)) { try { robot = new Robot(screen); } catch (AWTException e) { e.printStackTrace(); } break; } } if (robot != null) { bounds.x = 0; bounds.y = 0; return robot.createScreenCapture(bounds); } return null; } }