GridLayout下能不能改变网格大小??? 老师要求是这样的但是我用grid布局下来是相同大小的网格,能不能只改变backspace的大小,还是需要分开做? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 1-3-3:GridLayout的使用: GridLayout的类层次结构图: java.lang.Object --java.awt.GridLayout GridLayout比FlowLayout多了行和列的设置,也就是说你要先设置GridLayout共有几行几列,就如同二维平面一般,然后你加进去的组件会先填第一行的格子,然后再从第二行开始填,依此类扒,就像是一个个的格子一般。而且GridLayout会将所填进去组件的大小设为一样。构造函数:GridLayout()建立一个新的GridLayout,默认值是1行1列。 GridLayout(int rows,int cols)建立一个几行几列的GridLayout. GridLayout(int rows,int cols, int hgap,int vgap)建立一个几行几列的GridLayout,并设置组件的间距。例子:GridLayoutDemo.javaimport java.awt.*;import java.awt.event.*;import javax.swing.*;public class CardLayoutDemo implements ActionListener{ JPanel p1,p2,p3,p4; int i=1; JFrame f; public CardLayoutDemo(){ f=new JFrame();//当做top-level组件 Container contentPane=f.getContentPane(); contentPane.setLayout(new GridLayout(2,1)); p1=new JPanel(); Button b=new Button("Change Card"); b.addActionListener(this);//当按下"Change Card"时,进行事件监听,将会有系统操作产生。 p1.add(b); //处理操作在52-64行. contentPane.add(p1); p2=new JPanel(); p2.setLayout(new FlowLayout()); p2.add(new JButton("first")); p2.add(new JButton("second")); p2.add(new JButton("third")); p3=new JPanel(); p3.setLayout(new GridLayout(3,1)); p3.add(new JButton("fourth")); p3.add(new JButton("fifth")); p3.add(new JButton("This is the last button")); p4=new JPanel(); p4.setLayout(new CardLayout()); p4.add("one",p2); p4.add("two",p3); /*要显示CardLayout的卡片,除了用show(Container parent,String name)这个方法外 *,也可试试first(Container),next(Container),previous(Container),last(Container)这 *四个方法,一样可以达到显示效果。 */ ((CardLayout)p4.getLayout()).show(p4,"one"); contentPane.add(p4); f.setTitle("CardLayout"); f.pack(); f.setVisible(true); f.addWindowListener( new WindowAdapter(){ public void windowClosing(WindowEvent e){ System.exit(0); } } ); } public void actionPerformed(ActionEvent event){ switch(i){ case 1: ((CardLayout)p4.getLayout()).show(p4,"two"); break; case 2: ((CardLayout)p4.getLayout()).show(p4,"one"); break; } i++; if (i==3) i=1; f.validate(); } public static void main(String[] args){ new CardLayoutDemo(); }}1-3-5:GridBagLayout的使用:是java中最有弹性但也是最复杂的一种版面管理器。它只有一种构造函数,但必须配合 GridBagConstraints才能达到设置的效果。 GridBagLayout的类层次结构图: java.lang.Object --java.awt.GridBagLayout构造函数: GirdBagLayout()建立一个新的GridBagLayout管理器。 GridBagConstraints()建立一个新的GridBagConstraints对象。 GridBagConstraints(int gridx,int gridy,int gridwidth,int gridheight,double weightx,double weighty, int anchor,int fill, Insets insets,int ipadx,int ipady)建立一个新的GridBagConstraints对象 ,并指定其参数的值。 参数说明: gridx,gridy:设置组件的位置,gridx设置为GridBagConstraints.RELATIVE代表此组件位于之前所加入组件的右边。 若将gridy设置为GridBagConstraints.RELATIVE代表此组件位于以前所加入组件的下面。建议定义出 gridx,gridy的位置,以便以后维护程序。表示放在几行几列,gridx=0,gridy=0时放在0行0列。 gridwidth,gridheight:用来设置组件所占的单位长度与高度,默认值皆为1。你可以使用GridBagConstraints.REMAINDER常 量,代表此组件为此行或此列的最后一个组件,而且会占据所有剩余的空间。 weightx,weighty:用来设置窗口变大时,各组件跟着变大的比例,当数字越大,表示组件能得到更多的空间,默认值皆为0。 anchor: 当组件空间大于组件本身时,要将组件置于何处,有CENTER(默认值)、NORTH、NORTHEAST、EAST、SOUTHEAST、 WEST、NORTHWEST可供选择。 insets:设置组件之间彼此的间距,它有四个参数,分别是上,左,下,右,默认为(0,0,0,0). ipadx,ipady:设置组件内的间距,默认值为0。 我们以前提过,GridBagLayout里的各种设置都必须通过GridBagConstraints,因此当我们将GridBagConstraints的参数都设置好了之后,必须new一个GridBagConstraints的对象出来,以便GridBagLayout使用。例子:GridBagLayoutDemo.javaimport java.awt.*;import java.awt.event.*;import javax.swing.*;public class GridBagLayoutDemo{ public GridBagLayoutDemo(){ JButton b; GridBagConstraints c; int gridx,gridy,gridwidth,gridheight,anchor,fill,ipadx,ipady; double weightx,weighty; Insets inset; JFrame f=new JFrame(); GridBagLayout gridbag=new GridBagLayout(); Container contentPane=f.getContentPane(); contentPane.setLayout(gridbag); b=new JButton("first"); gridx=0; gridy=0; gridwidth=1; gridheight=1; weightx=10; weighty=1; anchor=GridBagConstraints.CENTER; fill=GridBagConstraints.HORIZONTAL; inset=new Insets(0,0,0,0); ipadx=0; ipady=0; c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor, fill,inset,ipadx,ipady); gridbag.setConstraints(b,c); contentPane.add(b); b=new JButton("second"); gridx=1; gridy=0; gridwidth=2; gridheight=1; weightx=1; weighty=1; anchor=GridBagConstraints.CENTER; fill=GridBagConstraints.HORIZONTAL; inset=new Insets(0,0,0,0); ipadx=50; ipady=0; c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor, fill,inset,ipadx,ipady); gridbag.setConstraints(b,c); contentPane.add(b); b=new JButton("third"); gridx=0; gridy=1; gridwidth=1; gridheight=1; weightx=1; weighty=1; anchor=GridBagConstraints.CENTER; fill=GridBagConstraints.HORIZONTAL; inset=new Insets(0,0,0,0); ipadx=0; ipady=50; c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor, fill,inset,ipadx,ipady); gridbag.setConstraints(b,c); contentPane.add(b); b=new JButton("fourth"); gridx=1; gridy=1; gridwidth=1; gridheight=1; weightx=1; weighty=1; anchor=GridBagConstraints.CENTER; fill=GridBagConstraints.HORIZONTAL; inset=new Insets(0,0,0,0); ipadx=0; ipady=0; c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor, fill,inset,ipadx,ipady); gridbag.setConstraints(b,c); contentPane.add(b); b=new JButton("This is the last button"); gridx=2; gridy=1; gridwidth=1; gridheight=2; weightx=1; weighty=1; anchor=GridBagConstraints.CENTER; fill=GridBagConstraints.HORIZONTAL; inset=new Insets(0,0,0,0); ipadx=0; ipady=50; c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor, fill,inset,ipadx,ipady); gridbag.setConstraints(b,c); contentPane.add(b); f.setTitle("GridBagLayout"); f.pack(); f.setVisible(true); f.addWindowListener( new WindowAdapter(){ public void windowClosing(WindowEvent e){ System.exit(0); } } ); } public static void main(String[] args){ new GridBagLayoutDemo(); }}两个例子 希望对你有所帮助! struts2.3能否在JDK1.5中运行,求大神解答下,感激不尽 float xx=rs.getFlloat("xx")出错,请高手指点 JAVA 求1~1000之间的连数相加 JAVA中如何实现可编辑的JLIST 北漂程序员的乐园 多线程问题 java多线程问题 如何用javascript调用vb的dll? 大家帮忙确定一下 请问B/S和C/S有什么区别? 代码的简化 我是新手,小写变大写,大写变小写,数字不变,其他的变*号,求指教,哪里出问题了...
1-3-3:GridLayout的使用:
GridLayout的类层次结构图:
java.lang.Object
--java.awt.GridLayout
GridLayout比FlowLayout多了行和列的设置,也就是说你要先设置GridLayout共有几行几列,就如同二维平面一般,然后你加
进去的组件会先填第一行的格子,然后再从第二行开始填,依此类扒,就像是一个个的格子一般。而且GridLayout会将所填进去组
件的大小设为一样。
构造函数:GridLayout()建立一个新的GridLayout,默认值是1行1列。
GridLayout(int rows,int cols)建立一个几行几列的GridLayout.
GridLayout(int rows,int cols, int hgap,int vgap)建立一个几行几列的GridLayout,并设置组件的间距。
例子:GridLayoutDemo.javaimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CardLayoutDemo implements ActionListener{
JPanel p1,p2,p3,p4;
int i=1;
JFrame f;
public CardLayoutDemo(){
f=new JFrame();//当做top-level组件
Container contentPane=f.getContentPane();
contentPane.setLayout(new GridLayout(2,1));
p1=new JPanel();
Button b=new Button("Change Card");
b.addActionListener(this);//当按下"Change Card"时,进行事件监听,将会有系统操作产生。
p1.add(b); //处理操作在52-64行.
contentPane.add(p1);
p2=new JPanel();
p2.setLayout(new FlowLayout());
p2.add(new JButton("first"));
p2.add(new JButton("second"));
p2.add(new JButton("third"));
p3=new JPanel();
p3.setLayout(new GridLayout(3,1));
p3.add(new JButton("fourth"));
p3.add(new JButton("fifth"));
p3.add(new JButton("This is the last button"));
p4=new JPanel();
p4.setLayout(new CardLayout());
p4.add("one",p2);
p4.add("two",p3);
/*要显示CardLayout的卡片,除了用show(Container parent,String name)这个方法外
*,也可试试first(Container),next(Container),previous(Container),last(Container)这
*四个方法,一样可以达到显示效果。
*/
((CardLayout)p4.getLayout()).show(p4,"one");
contentPane.add(p4);
f.setTitle("CardLayout");
f.pack();
f.setVisible(true);
f.addWindowListener(
new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent event){
switch(i){
case 1:
((CardLayout)p4.getLayout()).show(p4,"two");
break;
case 2:
((CardLayout)p4.getLayout()).show(p4,"one");
break;
}
i++;
if (i==3) i=1;
f.validate();
}
public static void main(String[] args){
new CardLayoutDemo();
}
}
1-3-5:GridBagLayout的使用:是java中最有弹性但也是最复杂的一种版面管理器。它只有一种构造函数,但必须配合
GridBagConstraints才能达到设置的效果。
GridBagLayout的类层次结构图:
java.lang.Object
--java.awt.GridBagLayout
构造函数:
GirdBagLayout()建立一个新的GridBagLayout管理器。
GridBagConstraints()建立一个新的GridBagConstraints对象。
GridBagConstraints(int gridx,int gridy,int gridwidth,int gridheight,double weightx,double weighty,
int anchor,int fill, Insets insets,int ipadx,int ipady)建立一个新的GridBagConstraints对象
,并指定其参数的值。
参数说明:
gridx,gridy:设置组件的位置,gridx设置为GridBagConstraints.RELATIVE代表此组件位于之前所加入组件的右边。
若将gridy设置为GridBagConstraints.RELATIVE代表此组件位于以前所加入组件的下面。建议定义出
gridx,gridy的位置,以便以后维护程序。表示放在几行几列,gridx=0,gridy=0时放在0行0列。 gridwidth,gridheight:用来设置组件所占的单位长度与高度,默认值皆为1。你可以使用GridBagConstraints.REMAINDER常
量,代表此组件为此行或此列的最后一个组件,而且会占据所有剩余的空间。 weightx,weighty:用来设置窗口变大时,各组件跟着变大的比例,当数字越大,表示组件能得到更多的空间,默认值皆为0。
anchor: 当组件空间大于组件本身时,要将组件置于何处,有CENTER(默认值)、NORTH、NORTHEAST、EAST、SOUTHEAST、
WEST、NORTHWEST可供选择。
insets:设置组件之间彼此的间距,它有四个参数,分别是上,左,下,右,默认为(0,0,0,0).
ipadx,ipady:设置组件内的间距,默认值为0。
我们以前提过,GridBagLayout里的各种设置都必须通过GridBagConstraints,因此当我们将GridBagConstraints的参数都设置
好了之后,必须new一个GridBagConstraints的对象出来,以便GridBagLayout使用。
例子:
GridBagLayoutDemo.javaimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class GridBagLayoutDemo{
public GridBagLayoutDemo(){
JButton b;
GridBagConstraints c;
int gridx,gridy,gridwidth,gridheight,anchor,fill,ipadx,ipady;
double weightx,weighty;
Insets inset;
JFrame f=new JFrame();
GridBagLayout gridbag=new GridBagLayout();
Container contentPane=f.getContentPane();
contentPane.setLayout(gridbag);
b=new JButton("first");
gridx=0;
gridy=0;
gridwidth=1;
gridheight=1;
weightx=10;
weighty=1;
anchor=GridBagConstraints.CENTER;
fill=GridBagConstraints.HORIZONTAL;
inset=new Insets(0,0,0,0);
ipadx=0;
ipady=0;
c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,
fill,inset,ipadx,ipady);
gridbag.setConstraints(b,c);
contentPane.add(b);
b=new JButton("second");
gridx=1;
gridy=0;
gridwidth=2;
gridheight=1;
weightx=1;
weighty=1;
anchor=GridBagConstraints.CENTER;
fill=GridBagConstraints.HORIZONTAL;
inset=new Insets(0,0,0,0);
ipadx=50;
ipady=0;
c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,
fill,inset,ipadx,ipady);
gridbag.setConstraints(b,c);
contentPane.add(b); b=new JButton("third");
gridx=0;
gridy=1;
gridwidth=1;
gridheight=1;
weightx=1;
weighty=1;
anchor=GridBagConstraints.CENTER;
fill=GridBagConstraints.HORIZONTAL;
inset=new Insets(0,0,0,0);
ipadx=0;
ipady=50;
c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,
fill,inset,ipadx,ipady);
gridbag.setConstraints(b,c);
contentPane.add(b);
b=new JButton("fourth");
gridx=1;
gridy=1;
gridwidth=1;
gridheight=1;
weightx=1;
weighty=1;
anchor=GridBagConstraints.CENTER;
fill=GridBagConstraints.HORIZONTAL;
inset=new Insets(0,0,0,0);
ipadx=0;
ipady=0;
c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,
fill,inset,ipadx,ipady);
gridbag.setConstraints(b,c);
contentPane.add(b); b=new JButton("This is the last button");
gridx=2;
gridy=1;
gridwidth=1;
gridheight=2;
weightx=1;
weighty=1;
anchor=GridBagConstraints.CENTER;
fill=GridBagConstraints.HORIZONTAL;
inset=new Insets(0,0,0,0);
ipadx=0;
ipady=50;
c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,
fill,inset,ipadx,ipady);
gridbag.setConstraints(b,c);
contentPane.add(b); f.setTitle("GridBagLayout");
f.pack();
f.setVisible(true);
f.addWindowListener(
new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
);
}
public static void main(String[] args){
new GridBagLayoutDemo();
}
}
两个例子 希望对你有所帮助!