Here you can find the source of charWidth(char ch, Font font)
public static int charWidth(char ch, Font font)
//package com.java2s; /*/*from w w w . j av a2 s .c o m*/ * Copyright 2000-2015 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.*; import java.awt.image.BufferedImage; public class Main { @SuppressWarnings("UndesirableClassUsage") private static final Graphics2D ourGraphics = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB) .createGraphics(); public static int charWidth(char ch, Font font) { return ourGraphics.getFontMetrics(font).charWidth(ch); } public static int charWidth(int ch, Font font) { return ourGraphics.getFontMetrics(font).charWidth(ch); } }