/*文章中用到的代码只是一部分，需要源码的可通过邮箱联系我 1978702969@qq.com*/
在上篇博客中提到了JAVA图形界面开发时的两种布局，流式布局和边框布局。
在实际使用中可能会发现，往容器中添加组件往往并不能得到想要的结果。比如想上下对齐两个组件，而流式布局是从左到右的，此时就很难实现上下对齐，此篇文章将介绍两个方法。
1.直接使用坐标贴图
如下面这个计算器的制作
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1 package Graphic;
2
3 import java.awt.BorderLayout;
4 import java.awt.Dimension;
5 import java.awt.FlowLayout;
6
7 import javax.swing.JButton;
8 import javax.swing.JFrame;
9 import javax.swing.JLabel;
10 import javax.swing.JPanel;
11 import javax.swing.JTextField;
12
13 public class Calculator {
14
15 public static void main(String[] args) {
16 Calculator login = new Calculator();
17 login.Init();
18 }
19
20 public void Init()
21 {
22 String arr[] = {"1","2","3","4","5","6","7","8","9","0","+","-","*","/","="};
23
24 JFrame frame = new JFrame();
25 frame.setTitle("计算器");
26 frame.setSize(600,400);
27 frame.setLocationRelativeTo(null);
28 frame.setDefaultCloseOperation(3);
29 frame.setResizable(false);
30
31 frame.setLayout(null);
32
33 JTextField text1 = new JTextField();
34 text1.setBounds(40, 20, 400, 40);
35 frame.add(text1);
36
37
38 for(int i=0;i<9;i++)
39 {
40 JButton button = new JButton();
41 button.setText(arr[i]);
42 button.setBounds((i%3)*100+40, (i/3)*60+80, 80, 40);
43 frame.add(button);
44 }
45
46 JButton button = new JButton();
47 button.setText("0");
48 button.setBounds(40, 260, 180, 40);
49 frame.add(button);
50
51 JButton button1 = new JButton();
52 button1.setText(".");
53 button1.setBounds(240, 260, 80, 40);
54 frame.add(button1);
55
56 for(int i=10;i<arr.length - 1;i++)
57 {
58 JButton button2 = new JButton();
59 button2.setText(arr[i]);
60 button2.setBounds(360, (i-10)*60+80, 80, 40);
61 frame.add(button2);
62 }
63
64
65 JButton button2 = new JButton();
66 button2.setText("x^2");
67 button2.setBounds(460, 80, 80, 40);
68 frame.add(button2);
69
70 JButton button3 = new JButton();
71 button3.setText("√x");
72 button3.setBounds(460, 140, 80, 40);
73 frame.add(button3);
74
75 JButton button4 = new JButton();
76 button4.setText("=");
77 button4.setBounds(460, 200, 80, 100);
78 frame.add(button4);
79
80 frame.setVisible(true);
81 }
82 }
2.设置组件大小
下面这个界面的制作
1 package Graphic;
2
3 import java.awt.BorderLayout;
4 import java.awt.Dimension;
5 import java.awt.FlowLayout;
6
7 import javax.swing.ImageIcon;
8 import javax.swing.JButton;
9 import javax.swing.JCheckBox;
10 import javax.swing.JFrame;
11 import javax.swing.JLabel;
12 import javax.swing.JPanel;
13 import javax.swing.JPasswordField;
14 import javax.swing.JTextField;
15
16 public class Login1 {
17
18 public static void main(String[] args) {
19 // TODO Auto-generated method stub
20 Login1 login = new Login1();
21 login.Init();
22 }
23
24 public void Init()
25 {
26 JFrame frame = new JFrame();
27 frame.setTitle("QQ");
28 frame.setSize(430,330);
29 frame.setLocationRelativeTo(null);
30 frame.setDefaultCloseOperation(3);
31 frame.setResizable(false);
32
33 BorderLayout b1 = new BorderLayout();
34 frame.setLayout(b1);
35 //添加图片 北
36 ImageIcon icon = new ImageIcon("C:\\Users\\long452a\\Desktop\\a1.jpg");
37 JLabel labIcon = new JLabel(icon);
38 frame.add(labIcon,BorderLayout.NORTH);
39
40 //添加面板容器：账号、密码
41 JPanel centerPanel = new JPanel();
42 centerPanel.setLayout(new FlowLayout(FlowLayout.CENTER,10,5));
43
44 JLabel labName = new JLabel("账号:");
45 labName.setHorizontalAlignment(JLabel.RIGHT);//这步很关键，通过设置右对齐的方式在前面补空
46 labName.setPreferredSize(new Dimension(110,30));
47 centerPanel.add(labName);
48
49 JTextField textName = new JTextField();
50 textName.setPreferredSize(new Dimension(180,30));
51 centerPanel.add(textName);
52
53
54 JLabel labPassowrd = new JLabel("密码 :");
55 labPassowrd.setHorizontalAlignment(JLabel.RIGHT);
56 labPassowrd.setPreferredSize(new Dimension(110,30));
57 centerPanel.add(labPassowrd);
58
59 JPasswordField textPassword = new JPasswordField();
60 textPassword.setPreferredSize(new Dimension(180,30));
61 centerPanel.add(textPassword,labPassowrd);
62
63
64 JPanel centerPanel1 = new JPanel();
65 centerPanel1.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));
66 JCheckBox rememberBox = new JCheckBox();
67 rememberBox.setText("记住密码");
68 rememberBox.setHorizontalAlignment(JLabel.RIGHT);
69 rememberBox.setPreferredSize(new Dimension(140,30));
70 centerPanel.add(rememberBox);
71
72 JCheckBox rememberBox2 = new JCheckBox();
73 rememberBox2.setText("自动登录");
74 rememberBox2.setHorizontalAlignment(JLabel.RIGHT);
75 rememberBox2.setPreferredSize(new Dimension(100,30));
76 centerPanel.add(rememberBox2);
77
78 JButton southButton = new JButton();
79 southButton.setPreferredSize(new Dimension(120,40));
80 southButton.setText("登录");
81 centerPanel1.add(southButton);
82
83 frame.add(centerPanel1, BorderLayout.SOUTH);
84 frame.add(centerPanel,BorderLayout.CENTER);
85 frame.setVisible(true);
86 }
87 }
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