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牛！！！谢谢！！！发自肺腑的！！！ ----------------解决方案--------------------------------------------------------
求助：一个布局的问题
功能已经实现，但是输入年份之后点击按钮，TextArea总是与按钮挤在一起，覆盖在按钮之上，调试很久都没成功，希望那个高手帮忙看一下，非常感谢
----------------解决方案--------------------------------------------------------
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
import java.util.*;
public class MyCalendar1 extends JFrame{
Calendar calendar;
int year , month, startDay;
String output;
//JFrame myFrame;
JPanel panel1 , panel2 , panel3 , panel4;
JRadioButton B1 , B2 , B3 , B4 , B5 , B6 , B7 , B8 , B9 , B10 , B11 , B12;
JLabel labelYear,label1;
JTextArea jtaCalendar;
JTextField tfYear;
ButtonGroup group;
int[] daysInMonth = new int[12];
public MyCalendar1(){
super("日历");
calendar = Calendar.getInstance();
panel1 = new JPanel();
panel2 = new JPanel();
panel3 = new JPanel();
panel4 = new JPanel();
label1 = new JLabel("注：请先输入年份，然后选择月份");
labelYear = new JLabel("输入年份");
tfYear = new JTextField(8);
tfYear.setEnabled(true);
panel1.setLayout(new FlowLayout());
panel1.add(label1);
panel1.add(labelYear);
panel1.add(tfYear);
group = new ButtonGroup();
B1 = new JRadioButton("一 月");
B2 = new JRadioButton("二 月");
B3 = new JRadioButton("三 月");
B4 = new JRadioButton("四 月");
B5 = new JRadioButton("五 月");
B6 = new JRadioButton("六 月");
B7 = new JRadioButton("七 月");
B8 = new JRadioButton("八 月");
B9 = new JRadioButton("九 月");
B10 = new JRadioButton("十 月");
B11 = new JRadioButton("十一月");
B12 = new JRadioButton("十二月");
group.add(B1);
group.add(B2);
group.add(B3);
group.add(B4);
group.add(B5);
group.add(B6);
group.add(B7);
group.add(B8);
group.add(B9);
group.add(B10);
group.add(B11);
group.add(B12);
B1.addActionListener(new myListener());
B2.addActionListener(new myListener());
B3.addActionListener(new myListener());
B4.addActionListener(new myListener());
B5.addActionListener(new myListener());
B6.addActionListener(new myListener());
B7.addActionListener(new myListener());
B8.addActionListener(new myListener());
B9.addActionListener(new myListener());
B10.addActionListener(new myListener());
B11.addActionListener(new myListener());
B12.addActionListener(new myListener());
panel2.setLayout(new GridLayout(2,6,0,0));
panel2.add(B1);
panel2.add(B2);
panel2.add(B3);
panel2.add(B4);
panel2.add(B5);
panel2.add(B6);
panel2.add(B7);
panel2.add(B8);
panel2.add(B9);
panel2.add(B10);
panel2.add(B11);
panel2.add(B12);
panel3.setLayout(new BoxLayout(panel3,BoxLayout.Y_AXIS));
panel3.add(panel1);
panel3.add(panel2);
// panel4.setLayout(new FlowLayout());
jtaCalendar = new JTextArea();
this.CalendarShow();
jtaCalendar.setEditable(false);
panel4.add(jtaCalendar);
Container cp=getContentPane();
cp.add(panel3,BorderLayout.NORTH);
cp.add(panel4,BorderLayout.SOUTH);
this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
this.pack();
this.setResizable(false);
this.setVisible(true);
this.setSize(400,300);
}
public static void main(String s[]){
new MyCalendar1();
}
//监听器类
class myListener implements ActionListener{
public void actionPerformed(ActionEvent e){
int year = Integer.parseInt(tfYear.getText().trim());
if(isLeapYear(year))
daysInMonth = new int[]{31,29,31,30,31,30,31,31,30,31,30,31};
else
daysInMonth = new int[]{31,28,31,30,31,30,31,31,30,31,30,31};
try{
if(e.getSource() == B1){
month = 0;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.JANUARY);
}
else if(e.getSource() == B2){
month = 1;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.FEBRUARY);
}
else if(e.getSource() == B3){
month = 2;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.MARCH);
}
else if(e.getSource() == B4){
month = 3;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.APRIL);
}
else if(e.getSource() == B5){
month = 4;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.MAY);
}
else if(e.getSource() == B6){
month = 5;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.JUNE);
}
else if(e.getSource() == B7){
month = 6;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.JULY);
}
else if(e.getSource() == B8){
month = 7;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.AUGUST);
}
else if(e.getSource() == B9){
month = 8;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.SEPTEMBER);
}
else if(e.getSource() == B10){
month = 9;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.OCTOBER);
}
else if(e.getSource() == B11){
month = 10;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.NOVEMBER);
}
else if(e.getSource() == B12){
month = 11;
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,Calendar.DECEMBER);
}
printMonthBody();
}
catch(NumberFormatException e1){
System.out.print("Error");
}
}
//获取月份名称
String getMonthName(){
String monthName = null;
switch(month){
case 0: monthName = "一 月"; break;
case 1: monthName = "二 月"; break;
case 2: monthName = "三 月"; break;
case 3: monthName = "四 月"; break;
case 4: monthName = "五 月"; break;
case 5: monthName = "六 月"; break;
case 6: monthName = "七 月"; break;
case 7: monthName = "八 月"; break;
case 8: monthName = "九 月"; break;
case 9: monthName = "十 月"; break;
case 10: monthName = "十 一 月"; break;
case 11: monthName = "十 二 月"; break;
}
return monthName;
}
void printMonthBody(){
calendar.set(Calendar.DAY_OF_MONTH,1);
int startDay = calendar.get(Calendar.DAY_OF_WEEK);
int year = Integer.parseInt(tfYear.getText().trim());
output = " " + getMonthName() + " " + year + "年" + "\n";
output += " - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" + "\n";
output += " 星期日 星期一 星期二 星期三 星期四 星期五 星期六" + "\n";
for(int i = 0;i < startDay - 1;i++)
output += " ";
for(int j = 1;j <= daysInMonth[month];j++){
if(j < 10)
output += " " + j;
else
output += " " + j;
if((j + startDay - 1) % 7 == 0)
output += "\n";
}
output += "\n";
jtaCalendar.setText(output);
}
boolean isLeapYear(int temp_year){
int year = Integer.parseInt(tfYear.getText().trim());
return (year % 400 == 0) || (year % 4 == 0 && year % 100 != 0);
}
}
void CalendarShow()
{
output = " "+"\n";
output += " - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -" + "\n";
output += " 星期日 星期一 星期二 星期三 星期四 星期五 星期六" + "\n";
output += " "+"\n";
output += " "+"\n";
output += " "+"\n";
output += " "+"\n";
output += " "+"\n";
output += " "+"\n";
jtaCalendar.setText(output);
}
}
我只改个大概..可能和你一开始的时候JTextArea没有内容有关系...