LayoutManager
, Serializable
public class FlowLayout extends Object implements LayoutManager, Serializable
componentOrientation
property and may be one of two values: ComponentOrientation.LEFT_TO_RIGHT
ComponentOrientation.RIGHT_TO_LEFT
align
property. The possible values are: For example, the following picture shows an applet using the flow layout manager (its default layout manager) to position three buttons:
Here is the code for this applet:
import java.awt.*; import java.applet.Applet; public class myButtons extends Applet { Button button1, button2, button3; public void init() { button1 = new Button("Ok"); button2 = new Button("Open"); button3 = new Button("Close"); add(button1); add(button2); add(button3); } }
A flow layout lets each component assume its natural (preferred) size.
Modifier and Type | Field | Description |
---|---|---|
static final int |
CENTER |
This value indicates that each row of components should be centered. |
static final int |
LEADING |
This value indicates that each row of components should be justified to the leading edge of the container's orientation, for example, to the left in left-to-right orientations. |
static final int |
LEFT |
This value indicates that each row of components should be left-justified. |
static final int |
RIGHT |
This value indicates that each row of components should be right-justified. |
static final int |
TRAILING |
This value indicates that each row of components should be justified to the trailing edge of the container's orientation, for example, to the right in left-to-right orientations. |
Constructor | Description |
---|---|
FlowLayout() |
Constructs a new FlowLayout with a centered alignment and a default 5-unit horizontal and vertical gap. |
FlowLayout |
Constructs a new FlowLayout with the specified alignment and a default 5-unit horizontal and vertical gap. |
FlowLayout |
Creates a new flow layout manager with the indicated alignment and the indicated horizontal and vertical gaps. |
Modifier and Type | Method | Description |
---|---|---|
void |
addLayoutComponent |
Adds the specified component to the layout. |
int |
getAlignment() |
Gets the alignment for this layout. |
boolean |
getAlignOnBaseline() |
Returns true if components are to be vertically aligned along their baseline. |
int |
getHgap() |
Gets the horizontal gap between components and between the components and the borders of the Container
|
int |
getVgap() |
Gets the vertical gap between components and between the components and the borders of the Container . |
void |
layoutContainer |
Lays out the container. |
Dimension |
minimumLayoutSize |
Returns the minimum dimensions needed to layout the visible components contained in the specified target container. |
Dimension |
preferredLayoutSize |
Returns the preferred dimensions for this layout given the visible components in the specified target container. |
void |
removeLayoutComponent |
Removes the specified component from the layout. |
void |
setAlignment |
Sets the alignment for this layout. |
void |
setAlignOnBaseline |
Sets whether or not components should be vertically aligned along their baseline. |
void |
setHgap |
Sets the horizontal gap between components and between the components and the borders of the Container . |
void |
setVgap |
Sets the vertical gap between components and between the components and the borders of the Container . |
String |
toString() |
Returns a string representation of this FlowLayout object and its values. |
public static final int LEFT
public static final int CENTER
public static final int RIGHT
public static final int LEADING
public static final int TRAILING
public FlowLayout()
FlowLayout
with a centered alignment and a default 5-unit horizontal and vertical gap.public FlowLayout(int align)
FlowLayout
with the specified alignment and a default 5-unit horizontal and vertical gap. The value of the alignment argument must be one of FlowLayout.LEFT
, FlowLayout.RIGHT
, FlowLayout.CENTER
, FlowLayout.LEADING
, or FlowLayout.TRAILING
.align
- the alignment valuepublic FlowLayout(int align, int hgap, int vgap)
The value of the alignment argument must be one of FlowLayout.LEFT
, FlowLayout.RIGHT
, FlowLayout.CENTER
, FlowLayout.LEADING
, or FlowLayout.TRAILING
.
align
- the alignment valuehgap
- the horizontal gap between components and between the components and the borders of the Container
vgap
- the vertical gap between components and between the components and the borders of the Container
public int getAlignment()
FlowLayout.LEFT
, FlowLayout.RIGHT
, FlowLayout.CENTER
, FlowLayout.LEADING
, or FlowLayout.TRAILING
.public void setAlignment(int align)
FlowLayout.LEFT
FlowLayout.RIGHT
FlowLayout.CENTER
FlowLayout.LEADING
FlowLayout.TRAILING
align
- one of the alignment values shown abovepublic int getHgap()
Container
Container
public void setHgap(int hgap)
Container
.hgap
- the horizontal gap between components and between the components and the borders of the Container
public int getVgap()
Container
.Container
public void setVgap(int vgap)
Container
.vgap
- the vertical gap between components and between the components and the borders of the Container
public void setAlignOnBaseline(boolean alignOnBaseline)
alignOnBaseline
- whether or not components should be vertically aligned on their baselinepublic boolean getAlignOnBaseline()
public void addLayoutComponent(String name, Component comp)
addLayoutComponent
in interface LayoutManager
name
- the name of the componentcomp
- the component to be addedpublic void removeLayoutComponent(Component comp)
removeLayoutComponent
in interface LayoutManager
comp
- the component to removepublic Dimension preferredLayoutSize(Container target)
preferredLayoutSize
in interface LayoutManager
target
- the container that needs to be laid outpublic Dimension minimumLayoutSize(Container target)
minimumLayoutSize
in interface LayoutManager
target
- the container that needs to be laid outpublic void layoutContainer(Container target)
FlowLayout
object.layoutContainer
in interface LayoutManager
target
- the specified component being laid outpublic String toString()
FlowLayout
object and its values.
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/FlowLayout.html