教你用java编写计算器（三）

野性酷女 2023-07-07 05:56 55阅读 0赞

教你用java编写计算器（三）  
import java.awt.Color;  
import java.awt.Dimension;  
import java.awt.event.ActionListener;  
import javax.swing.JButton;  
import javax.swing.JFrame;  
import javax.swing.JMenu;  
import javax.swing.JMenuBar;  
import javax.swing.JMenuItem;  
import javax.swing.JPanel;  
import javax.swing.JTextField;

public class Myclass extends JFrame \{  
private JPanel jp1,jp2;  
private JButton jb;  
private JTextField display1, display2, display3;  
private JMenuBar jmb;  
private JMenu jm;  
private JMenuItem jmi;  
private final String\[\] firstmenu = \{ “查看(V)”, “编辑(E)”, “帮助(H)” \};  
private final String\[\]\[\] secondMenu = \{  
\{ “标准型”, “科学型”, “程序员”, “统计信息”, “历史信息”, “数字分组”, “基本”, “单位转换”,  
“日期计算”, “工作表” \}, \{ “复制©”, “粘贴§”, “历史记录” \},  
\{ “查看帮助(V)”, “关于计算器(A)” \} \};  
private final char\[\] Mnemonic = \{ ‘V’, ‘E’, ‘H’ \};  
private String buttonsName\[\]=\{“MC”,“MR”,“MS”,“M+”,“M-”,  
“←”,“CE”,“C”,“±”,“√”,  
“7”,“8”,“9”,"/","%",  
“4”,“5”,“6”,"\*",“1/x”,  
“1”,“2”,“3”,"-","=",  
“0”,".","+"\};

public Myclass()\{  
for (int i = 0; i < buttonsName.length; i++) \{  
jb = new JButton(buttonsName\[i\]);  
if (i == 24) \{  
jb.setBounds(i % 5 \*(35 +7),65 + i /5 \* (29 + 7), 35, 65);  
\} else if (i ==25) \{  
jb.setBounds(i % 5 \*(35 +7),65 + i /5 \* (29 + 7), 77, 29);  
\} else if (i > 25) \{  
jb.setBounds(i % 5 \*(35 +7)+5+42,65 + i /5 \* (29 + 7), 35,29);  
\} else \{  
jb.setBounds(i % 5 \*(35 +7),65 + i /5 \* (29 + 7), 35, 29);//测量长宽和间距  
\}  
jb.setMarigin(new java.awt.Insets(0,0,0,0) );  
thsi.add(jb);  
\{

\}\{  
\}  
\}  
this.setTitle(“计算器”);display2 = new JTextField(“0”);  
display2.setBounds(12, 12, 190, 50);  
display2.setFont(new Font(“宋体”, Font.BOLD, 26));  
display2.setHorizontalAlignment(JLabel.RIGHT);  
display2.setEnabled(false);  
display2.setDisabledTextColor(Color.BLACK);  
display2.setBackground(new Color(247, 250, 254));  
this.add(display2);  
this.setLayout(null);  
this.setTitle(“计算器”);  
this.setLocation(500, 200);  
this.setSize(230, 320);  
this.setBackground(new Color(217, 228, 241));  
this.setDefaultCloseOperation(JFrame.EXIT\_ON\_CLOSE);  
this.setVisible(true);  
\}

public static void main(String[] args) {

new Myclass();

}

\}  
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