"Lab 12-26-2005 (1)"

public class yusj
{
public static void main(String[] xxx)
{
System.out.println(xxx[0]+" "+xxx[2]+xxx[1]);
}
}

Lab 12-19-2005 Sorting

Homework 12-19-2005 Lab Equal Arrays

Lab Complex

public void setNumber(int r, int i)
{
this.r=r;
/*如果是number1.setNumber
this.r指的是number1的r
也就是執行動作的物件就是this
....恩...剛剛突然一陣混亂*/
this.i=i;
}

-----------------------------------
可是如果改寫成
private Complex number;
public void setNumber(int r,int i)
{
number.r=r;
number.i=i;
}
似乎並沒有立即的語法錯誤
可是run起來還是有誤
而且看不太懂....
如下

Homework 12-12-2005 Counter II

恩...其實對於toString的部分
感覺上不是很懂...=.=a

Lab 12-12-2005 (2) Static Class

Lab Constructors

Homework 12-5-2005

未設定temp1時，temp1的輸出
The temperature = 0.0 degrees c
將temp2設定為0度C
The temperature = 0.0 degrees C
將temp1的scale更改為F
The temperature = 0.0 degrees F
設定temp1的度數部分為212
The temperature = 212.0 degrees F
設定temp2的degree和scale
The temperature = 100.0 degrees C
將100度c的temp2轉換成華氏
The temperature = 212.0 degrees F
temp1(212度F)是否相等/高/低於temp2(由100度C轉成的212度F)?
Are temp1 and temp2 equal? true
Is temp1 greater than temp2? false
Is temp1 less than temp2? false
設定temp1=0度C，轉換成如下(兩者相等)
The temperature = 32.0 degrees F
設定temp1=-40度F，轉換成如下(兩者相等)
The temperature = -40.0 degrees C

Lab 12-5-2005 (2) Overloading

不曉得為什麼跑出來的結果像是亂碼
也確認過他的型態等等問題
也沒有語法上面的錯誤
總之就很奇怪

後來做些更改
在class DateSixthTry的地方增加
public void outPut()
{
System.out.println(month+" "+day+","+year);
}
然後
在class OverloadingDemo的地方
改
System.out.println(date1);
System.out.println(date2);
System.out.println(date3);
為
date1.outPut();
date2.outPut();
date3.outPut();
之後就可以正常顯示結果如下
至於之前為什麼還是亂碼...
我還是不曉得....>"<

"This"practice

package practicethis;import javax.swing.JOptionPane;
public class First
{
private String month;
private int day;
private int year;
public void writeOutput()
{
System.out.println(year+"/"+month+"/"+day);
}

public void readInput()
{
String StringYear = JOptionPane.showInputDialog("Enter year");
year = Integer.parseInt(StringYear);
month = JOptionPane.showInputDialog("Enter month");
String StringDay = JOptionPane.showInputDialog("Enter day");
day = Integer.parseInt(StringDay);
}

public void setDate(int month, int day, int year)
{
this.day = day;
this.year = year;
this.month = monthString(month);
}
public String monthString(int month)
{
switch (month)
{
case 1:
return "January";
case 2:
return "February";
case 3:
return "March";
case 4:
return "April";
case 5:
return "May";
case 6:
return "June";
case 7:
return "July";
case 8:
return "August";
case 9:
return "September";
case 10:
return "October";
case 11:
return "November";
case 12:
return "December";
default:
System.exit(0);
return "Eorror";
}
}

public int getDay()
{ return day; }
public int getYear()
{ return year; }
public int getmonth()
{
if (month.equalsIgnoreCase("January"))
return 1;
else if (month.equalsIgnoreCase("February"))
return 2;
else if (month.equalsIgnoreCase("March"))
return 3;
else if (month.equalsIgnoreCase("April"))
return 4;
else if (month.equalsIgnoreCase("May"))
return 5;
else if (month.equalsIgnoreCase("June"))
return 6;
else if (month.equalsIgnoreCase("July"))
return 7;
else if (month.equalsIgnoreCase("August"))
return 8;
else if (month.equalsIgnoreCase("September"))
return 9;
else if (month.equalsIgnoreCase("October"))
return 10;
else if (month.equalsIgnoreCase("November"))
return 11;
else if (month.equalsIgnoreCase("December"))
return 12;
else
{
System.out.println("FATAL ERROR"); System.exit(0); return 0;
}
}
}

======================================

package practicethis;
public class Second
{
public static void main(String[] args)
{
First date =new First();
int year=2005;
date.setDate(6,17,year);
date.writeOutput();
date.readInput();
date.writeOutput();
}
}

======================================

"This"practice

package practicethis;import javax.swing.JOptionPane;
public class First
{
private String month;
private int day;
private int year;
public void writeOutput()
{
System.out.println(year+"/"+month+"/"+day);
}

public void readInput()
{
String StringYear = JOptionPane.showInputDialog("Enter year");
year = Integer.parseInt(StringYear);
month = JOptionPane.showInputDialog("Enter month");
String StringDay = JOptionPane.showInputDialog("Enter day");
day = Integer.parseInt(StringDay);
}
public void setDate(int month, int day, int year)
{
this.day = day; this.year = year; this.month = monthString(month);
}
public String monthString(int month)
{
switch (month)
{
case 1: return "January";
case 2: return "February";
case 3: return "March";
case 4: return "April";
case 5: return "May";
case 6: return "June";
case 7: return "July";
case 8: return "August";
case 9: return "September";
case 10: return "October";
case 11: return "November";
case 12: return "December";
default: System.exit(0);
return "Eorror";
}
}
public int getDay() { return day; }
public int getYear() { return year; }
public int getmonth()
{ if (month.equalsIgnoreCase("January")) return 1;
else if (month.equalsIgnoreCase("February")) return 2;
else if (month.equalsIgnoreCase("March")) return 3;
else if (month.equalsIgnoreCase("April")) return 4;
else if (month.equalsIgnoreCase("May")) return 5;
else if (month.equalsIgnoreCase("June")) return 6;
else if (month.equalsIgnoreCase("July")) return 7;
else if (month.equalsIgnoreCase("August")) return 8;
else if (month.equalsIgnoreCase("September")) return 9;
else if (month.equalsIgnoreCase("October")) return 10;
else if (month.equalsIgnoreCase("November")) return 11;
else if (month.equalsIgnoreCase("December")) return 12;
else { System.out.println("FATAL ERROR");
System.exit(0);
return 0;
}
}
public boolean precedes(First otherDate)
{
return((year}
}
========
package practicethis;public class Second
{
public static void main(String[] args)
{
First date1= new First();
First date2= new First();
int year=2005;
date1.setDate(6,17,year);
date1.writeOutput();
date1.readInput();
date1.writeOutput();
date2.readInput();
date2.writeOutput();
if (date2.precedes(date1))
date2.writeOutput();
else
date1.writeOutput();
}
}

Homework 11-28-2005

Object numberA的內容物存到number1,number1=0
Object numberB的內容物存到number2,number2=0
但本身還是兩個objects

你的跑車漆成紅色的，放在你的車庫
我的跑車也漆成紅色的，放在我的車庫
但是你的那輛紅色跑車不是我的這輛紅色跑車
因為這兩者是實際存在的分別物體
無關乎這兩者是否都是紅色(內容物)的跑車