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JDK 1.1 Source Code Directory
JDK 1.1 source code directory contains Java source code for JDK 1.1 core classes:
"C:\fyicenter\jdk-1.1.8\src".
Here is the list of Java classes of the JDK 1.1 source code:
✍: FYIcenter
⏎ java/awt/FontMetrics.java
/* * @(#)FontMetrics.java 1.19 01/12/10 * * Copyright 2002 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.awt; /** * A font metrics object, which gives information about the rendering * of a particular font on a particular screen. Note that the * implementations of these methods are inefficient, they are usually * overridden with more efficient toolkit-specific implementations. * <p> * <b>Note to subclassers</b>: Since many of these methods form closed * mutually recursive loops, you must take care that you implement * at least one of the methods in each such loop in order to prevent * infinite recursion when your subclass is used. * In particular, the following is the minimal suggested set of methods * to override in order to ensure correctness and prevent infinite * recursion (though other subsets are equally feasible): * <ul> * <li><a href=#getAscent>getAscent</a>() * <li><a href=#getAscent>getDescent</a>() * <li><a href=#getLeading>getLeading</a>() * <li><a href=#getMaxAdvance>getMaxAdvance</a>() * <li><a href="#charWidth(char)">charWidth</a>(char ch) * <li><a href="#charsWidth(char[], int, int)">charsWidth</a>(char data[], int off, int len) * </ul> * <p> * <img src="images-awt/FontMetrics-1.gif" border=15 align * ALIGN=right HSPACE=10 VSPACE=7> * When an application asks AWT to place a character at the position * (<i>x</i>, <i>y</i>), the character is placed so that its * reference point (shown as the dot in the accompanying image) is * put at that position. The reference point specifies a horizontal * line called the <i>baseline</i> of the character. In normal * printing, the baselines of characters should align. * <p> * In addition, every character in a font has an <i>ascent</i>, a * <i>descent</i>, and an <i>advance width</i>. The ascent is the * amount by which the character ascends above the baseline. The * descent is the amount by which the character descends below the * baseline. The advance width indicates the position at which AWT * should place the next character. * <p> * If the current character is placed with its reference point * at the position (<i>x</i>, <i>y</i>), and * the character's advance width is <i>w</i>, then the following * character is placed with its reference point at the position * (<i>x </i><code>+</code><i> w</i>, <i>y</i>). * The advance width is often the same as the width of character's * bounding box, but need not be so. In particular, oblique and * italic fonts often have characters whose top-right corner extends * slightly beyond the advance width. * <p> * An array of characters or a string can also have an ascent, a * descent, and an advance width. The ascent of the array is the * maximum ascent of any character in the array. The descent is the * maximum descent of any character in the array. The advance width * is the sum of the advance widths of each of the characters in the * array. * @version 1.19 12/10/01 * @author Jim Graham * @see java.awt.Font * @since JDK1.0 */ public abstract class FontMetrics implements java.io.Serializable { /** * The actual font. * @see #getFont * @since JDK1.0 */ protected Font font; /* * JDK 1.1 serialVersionUID */ private static final long serialVersionUID = 1681126225205050147L; /** * Creates a new <code>FontMetrics</code> object for finding out * height and width information about the specified font and * specific character glyphs in that font. * @param font the font * @see java.awt.Font * @since JDK1.0 */ protected FontMetrics(Font font) { this.font = font; } /** * Gets the font described by this font metric. * @return the font described by this font metric. * @since JDK1.0 */ public Font getFont() { return font; } /** * Determines the <em>standard leading</em> of the font described by * this font metric. The standard leading (interline spacing) is the * logical amount of space to be reserved between the descent of one * line of text and the ascent of the next line. The height metric is * calculated to include this extra space. * @return the standard leading of the font. * @see java.awt.FontMetrics#getHeight * @see java.awt.FontMetrics#getAscent * @see java.awt.FontMetrics#getDescent * @since JDK1.0 */ public int getLeading() { return 0; } /** * Determines the <em>font ascent</em> of the font described by this * font metric. The font ascent is the distance from the font's * baseline to the top of most alphanumeric characters. Some * characters in the font may extend above the font ascent line. * @return the font ascent of the font. * @see java.awt.FontMetrics#getMaxAscent * @since JDK1.0 */ public int getAscent() { return font.getSize(); } /** * Determines the <em>font descent</em> of the font described by this * font metric. The font descent is the distance from the font's * baseline to the bottom of most alphanumeric characters with * descenders. Some characters in the font may extend below the font * descent line. * @return the font descent of the font. * @see java.awt.FontMetrics#getMaxDescent * @since JDK1.0 */ public int getDescent() { return 0; } /** * Gets the standard height of a line of text in this font. This * is the distance between the baseline of adjacent lines of text. * It is the sum of the leading + ascent + descent. There is no * guarantee that lines of text spaced at this distance will be * disjoint; such lines may overlap if some characters overshoot * either the standard ascent or the standard descent metric. * @return the standard height of the font. * @see java.awt.FontMetrics#getLeading * @see java.awt.FontMetrics#getAscent * @see java.awt.FontMetrics#getDescent * @since JDK1.0 */ public int getHeight() { return getLeading() + getAscent() + getDescent(); } /** * Determines the maximum ascent of the font described by this font * metric. No character extends further above the font's baseline * than this height. * @return the maximum ascent of any character in the font. * @see java.awt.FontMetrics#getAscent * @since JDK1.0 */ public int getMaxAscent() { return getAscent(); } /** * Determines the maximum descent of the font described by this font * metric. No character extends further below the font's baseline * than this height. * @return the maximum descent of any character in the font. * @see java.awt.FontMetrics#getDescent * @since JDK1.0 */ public int getMaxDescent() { return getDescent(); } /** * For backward compatibility only. * @see #getMaxDescent * @deprecated As of JDK version 1.1.1, * replaced by <code>getMaxDescent()</code>. */ public int getMaxDecent() { return getMaxDescent(); } /** * Gets the maximum advance width of any character in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @return the maximum advance width of any character * in the font, or <code>-1</code> if the * maximum advance width is not known. * @since JDK1.0 */ public int getMaxAdvance() { return -1; } /** * Returns the advance width of the specified character in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @param ch the character to be measured * @return the advance width of the specified <code>char</code> * in the font described by this font metric. * @see java.awt.FontMetrics#charsWidth * @see java.awt.FontMetrics#stringWidth * @since JDK1.0 */ public int charWidth(int ch) { return charWidth((char)ch); } /** * Returns the advance width of the specified character in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @param ch the character to be measured * @return the advance width of the specified <code>char</code> > * in the font described by this font metric. * @see java.awt.FontMetrics#charsWidth * @see java.awt.FontMetrics#stringWidth * @since JDK1.0 */ public int charWidth(char ch) { if (ch < 256) { return getWidths()[ch]; } char data[] = {ch}; return charsWidth(data, 0, 1); } /** * Returns the total advance width for showing the specified String * in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @param str the String to be measured * @return the advance width of the specified string * in the font described by this font metric. * @see java.awt.FontMetrics#bytesWidth * @see java.awt.FontMetrics#charsWidth * @since JDK1.0 */ public int stringWidth(String str) { int len = str.length(); char data[] = new char[len]; str.getChars(0, len, data, 0); return charsWidth(data, 0, len); } /** * Returns the total advance width for showing the specified array * of characters in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @param data the array of characters to be measured * @param off the start offset of the characters in the array * @param len the number of characters to be measured from the array * @return the advance width of the subarray of the specified * <code>char</code> array in the font described by * this font metric. * @see java.awt.FontMetrics#charWidth(int) * @see java.awt.FontMetrics#charWidth(char) * @see java.awt.FontMetrics#bytesWidth * @see java.awt.FontMetrics#stringWidth * @since JDK1.0 */ public int charsWidth(char data[], int off, int len) { return stringWidth(new String(data, off, len)); } /** * Returns the total advance width for showing the specified array * of bytes in this Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @param data the array of bytes to be measured * @param off the start offset of the bytes in the array * @param len the number of bytes to be measured from the array * @return the advance width of the subarray of the specified * <code>byte</code> array in the font described by * this font metric. * @see java.awt.FontMetrics#charsWidth * @see java.awt.FontMetrics#stringWidth * @since JDK1.0 */ public int bytesWidth(byte data[], int off, int len) { return stringWidth(new String(data, 0, off, len)); } /** * Gets the advance widths of the first 256 characters in the Font. * The advance width is the amount by which the current point is * moved from one character to the next in a line of text. * @return an array giving the advance widths of the * characters in the font * described by this font metric. * @since JDK1.0 */ public int[] getWidths() { int widths[] = new int[256]; for (char ch = 0 ; ch < 256 ; ch++) { widths[ch] = charWidth(ch); } return widths; } /** * Returns a representation of this <code>FontMetric</code> * object's values as a string. * @return a string representation of this font metric. * @since JDK1.0. */ public String toString() { return getClass().getName() + "[font=" + getFont() + "ascent=" + getAscent() + ", descent=" + getDescent() + ", height=" + getHeight() + "]"; } }
⏎ java/awt/FontMetrics.java
Or download all of them as a single archive file:
File name: jdk-1.1.8-src.zip File size: 1574187 bytes Release date: 2018-11-16 Download
⇒ Backup JDK 1.1 Installation Directory
2018-11-17, 175195👍, 0💬
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