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ÐèÒªÓõ½²¼¾ÖÈÝÆ÷¹ÜÀíÆ÷(LayoutManager)£ºËüÓÃÓÚÐÖúÈÝÆ÷È·¶¨¼ÓÈëµÄ×é¼þ(°´Å¥µÈ)Ó¦¸Ã·ÅÖõÄλÖÃ
awtÌṩÁË4Öг£ÓõIJ¼¾ÖÈÝÆ÷¹ÜÀíÆ÷
>>FlowLayout
>>BorderLayout
>>GridLayout
>>CardLayout
appletĬÈÏʹÓÃFlowLayout,appletʹÓÃÈÝÆ÷¹ÜÀíÆ÷µÄ·½·¨ÈçÏ£º
setLayout (new BorderLayout)
setLayout()·½·¨ÊÇappletÀà¼Ì³ÐContainerÀàÖеķ½·¨¶øÀ´£¬Òò´ËÔÚapplet³ÌÐòÖпÉÒÔÖ±½Óµ÷ÓÃ
applet¼ÓÈë°´Å¥Ò»¶¨ÐèÒªÉÏÃæµÄÈÝÆ÷¹ÜÀíÆ÷ô£¿
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JButton b1 = new JButton("hello");
getContentPane().add(b1);
b1.setLocation(100,10);
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applet ʹÓà FlowLayout ²¼¾Ö£º
Ö¸¶¨²¼¾Ö:setLayout(new FlowLayout())
¼ÓÈë×é¼þ£ºadd(×é¼þʵÀý)
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¼ÓÈë×é¼þʹÓÃappletÀà¼Ì³ÐContainerÀàÖеķ½·¨³ÉÔ±add();
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import java.awt.*;
import java.applet.*;
public class UseFlowLayout extends Applet{
public void init()
{
setLayout(new FlowLayout()); //ÒòΪÊÇĬÈϹÜÀíÆ÷£¬¿ÉÒÔÊ¡ÂÔ
//setLayout()·½·¨ÊÇappletÀà¼Ì³ÐContainerÀàÖеķ½·¨¶øÀ´£¬Òò´ËÔÚapplet³ÌÐòÖпÉÒÔÖ±½Óµ÷ÓÃ
for(int i = 0; i<5;i++){
add(new Button("°´Å¥" + i )); //¼ÓÈë5¸ö°´Å¥
//appletÀà¼Ì³ÐContainerÀàÖеķ½·¨³ÉÔ±add();
}
}
}
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appletʹÓÃBorderLayout();
Ö¸¶¨²¼¾Ö£ºsetLayout(new BorderLayout());
¼ÓÈë×é¼þ£ºadd(×é¼þʵÀý,λÖó£Á¿)
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import java.util.LinkedList;
import java.util.List;
public class ShortestPaths {
private static String showPath[] = { "", "", "", "", "", "" };
& ......
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import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class ConnectDB {
private static final String MYSQL = "jdbc:mysql://";
private static final String ORACLE = "jdbc:oracle:thin:@";
private ConnectD ......
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alt + shift + o
/**
* дÈëÈÕÖ¾
* filePath ÈÕÖ¾ÎļþµÄ·¾¶
* code ҪдÈëÈÕÖ¾ÎļþµÄÄÚÈÝ
*/
public
static
boolean
print(String filePath,String code) {
try
{
File tofile
=
new
File(filePath);
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DecimalFormat df = new DecimalFormat(",###.00");
double aNumber = 33665448856.6568975;
String result = df.format(aNumber);
Sytem. out.println(result);
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33,665,448,856.66
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StringTokenizer(String s) ¹¹ÔìÒ» ......