public abstract class LineMetrics extends Object
LineMetrics class allows access to the
 metrics needed to layout characters along a line
 and to layout of a set of lines.  A LineMetrics
 object encapsulates the measurement information associated
 with a run of text.
 
 Fonts can have different metrics for different ranges of
 characters.  The getLineMetrics methods of
 Font take some text as an argument
 and return a LineMetrics object describing the
 metrics of the initial number of characters in that text, as
 returned by getNumChars().
| Constructor and Description | 
|---|
| LineMetrics() | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract float | getAscent()Returns the ascent of the text. | 
| abstract int | getBaselineIndex()Returns the baseline index of the text. | 
| abstract float[] | getBaselineOffsets()Returns the baseline offsets of the text,
 relative to the baseline of the text. | 
| abstract float | getDescent()Returns the descent of the text. | 
| abstract float | getHeight()Returns the height of the text. | 
| abstract float | getLeading()Returns the leading of the text. | 
| abstract int | getNumChars()Returns the number of characters ( charvalues) in the text whose
 metrics are encapsulated by thisLineMetricsobject. | 
| abstract float | getStrikethroughOffset()Returns the position of the strike-through line
 relative to the baseline. | 
| abstract float | getStrikethroughThickness()Returns the thickness of the strike-through line. | 
| abstract float | getUnderlineOffset()Returns the position of the underline relative to
 the baseline. | 
| abstract float | getUnderlineThickness()Returns the thickness of the underline. | 
public abstract int getNumChars()
char values) in the text whose
 metrics are encapsulated by this LineMetrics
 object.char values) in the text with which
         this LineMetrics was created.public abstract float getAscent()
public abstract float getDescent()
public abstract float getLeading()
public abstract float getHeight()
public abstract int getBaselineIndex()
ROMAN_BASELINE,
 CENTER_BASELINE,
 HANGING_BASELINE.public abstract float[] getBaselineOffsets()
CENTER_BASELINE then
 offsets[HANGING_BASELINE] is usually
 negative, offsets[CENTER_BASELINE]
 is zero, and offsets[ROMAN_BASELINE]
 is usually positive.public abstract float getStrikethroughOffset()
public abstract float getStrikethroughThickness()
public abstract float getUnderlineOffset()
public abstract float getUnderlineThickness()
 Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2025, Oracle and/or its affiliates.  All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.