Java if-then 语句和整数的字符串问题
Java string issue with if-then statement and ints
我正在尝试将当前时间放入一个 L.E.D.-like 输出中，并且每次都能够手动生成；但我很难自动显示当前时间。
在当前输出中，我有四个单独字符串的时间和 L.E.D 中的时间输出。格式：
0
-7
5
6
_
| |
|_|
__ . __
| __| |_| __|
| |__ . | __|
我下面的代码解释得更好。抱歉造成混淆。
import java.util.Calendar;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class main {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//get current hour
DateFormat dateFormat = new SimpleDateFormat("HH");
Date date = new Date();
String hour = dateFormat.format(date);
int hr = Integer.parseInt(hour);
//Separate hour into two int's
int f = hr-12;
int y = f / 10;
int u = f % 10;
//get current minutes
DateFormat dfm = new SimpleDateFormat("mm");
Date dm = new Date();
String min = dfm.format(dm);
int mn = Integer.parseInt(min);
//Separate minutes into two int's
int a = mn;
int i = a / 10;
int o = a % 10;
//print the time respectively
System.out.println(y);
System.out.println(u);
System.out.println(i);
System.out.println(o);
//characters to write the numbers
String text = " . ";
String t = "_";
String l = "|";
String sp = " ";
String br = "\n";
//top middle and bottom characters
String t0 = sp+sp+t+sp+sp;
String m0 = sp+l+sp+l+sp;
String b0 = sp+l+t+l+sp;
//Ex: System.out.println(t0+br+m0+br+b0); would print the number 0 in led output
System.out.println(t0+br+m0+br+b0);
String t1 = sp+sp+sp+sp+sp;
String m1 = sp+sp+sp+l+sp;
String b1 = sp+sp+sp+l+sp;
String t2 = sp+t+t+sp+sp;
String m2 = sp+t+t+l+sp;
String b2 = l+t+t+sp+sp;
String t3 = sp+t+t+sp+sp;
String m3 = sp+t+t+l+sp;
String b3 = sp+t+t+l+sp;
String t4 = sp+sp+sp+sp+sp;
String m4 = sp+l+t+l+sp;
String b4 = sp+sp+sp+l+sp;
String t5 = sp+sp+t+t+sp;
String m5 = sp+l+t+sp+sp;
String b5 = sp+t+t+l+sp;
String t6 = sp+sp+t+sp+sp;
String m6 = sp+l+t+sp+sp;
String b6 = sp+l+t+l+sp;
String t7 = sp+t+t+sp+sp;
String m7 = sp+sp+sp+l+sp;
String b7 = sp+sp+sp+l+sp;
String t8 = sp+sp+t+sp+sp;
String m8 = sp+l+t+l+sp;
String b8 = sp+l+t+l+sp;
String t9 = sp+sp+t+sp+sp;
String m9 = sp+l+t+l+sp;
String b9 = sp+sp+sp+l+sp;
// My attempt to change the int's from the current date into variables for their output
if (y == 0) {
String a1 = t0;
String a2 = m0;
String a3 = b0;
} else if (y == 1) {
String a1 = t1;
String a2 = m1;
String a3 = b1;
} else if (y == 2) {
String a1 = t2;
String a2 = m2;
String a3 = b2;
} else if (y == 3) {
String a1 = t3;
String a2 = m3;
String a3 = b3;
} else if (y == 4) {
String a1 = t4;
String a2 = m4;
String a3 = b4;
} else if (y == 5) {
String a1 = t5;
String a2 = m5;
String a3 = b5;
} else if (y == 6) {
String a1 = t6;
String a2 = m6;
String a3 = b6;
} else if (y == 7) {
String a1 = t7;
String a2 = m7;
String a3 = b7;
} else if (y == 8) {
String a1 = t8;
String a2 = m8;
String a3 = b8;
} else if (y == 9) {
String a1 = t9;
String a2 = m9;
String a3 = b9;
} else {
String too = "F";
}
if (u == 0) {
String x1 = t0;
String x2 = m0;
String x3 = b0;
} else if (u == 1) {
String x1 = t1;
String x2 = m1;
String x3 = b1;
} else if (u == 2) {
String x1 = t2;
String x2 = m2;
String x3 = b2;
} else if (u == 3) {
String x1 = t3;
String x2 = m3;
String x3 = b3;
} else if (u == 4) {
String x1 = t4;
String x2 = m4;
String x3 = b4;
} else if (u == 5) {
String x1 = t5;
String x2 = m5;
String x3 = b5;
} else if (u == 6) {
String x1 = t6;
String x2 = m6;
String x3 = b6;
} else if (u == 7) {
String x1 = t7;
String x2 = m7;
String x3 = b7;
} else if (u == 8) {
String x1 = t8;
String x2 = m8;
String x3 = b8;
} else if (u == 9) {
String x1 = t9;
String x2 = m9;
String x3 = b9;
} else {
String x1 = t9;
String x2 = m9;
String x3 = b9;
}
//The set up to print 12:43 in led format
//i would like to remove this so i can display the current time but i get errors
String a1 = t1;
String x1 = t2;
String c1 = text;
String d1 = t4;
String e1 = t3;
String a2 = m1;
String x2 = m2;
String c2 = " ";
String d2 = m4;
String e2 = m3;
String a3 = b1;
String x3 = b2;
String c3 = text;
String d3 = b4;
String e3 = b3;
//using the setup to display the time
String time= a1+x1+c1+d1+e1+br+a2+x2+c2+d2+e2+br+a3+x3+c3+d3+e3;
//printing the time
System.out.println(time);
}
}
一个更易读的版本如何做同样的事情（想想写一个通读你的代码的版本会更容易:)...
String s = " ";
String[][] d = new String[][] {
new String[] {" __ ", " ", " __ ", " __ ", " ", " __ ", " __ ", " __ ", " __ ", " __ ", " . "},
new String[] {"| |", " | ", " __|", " __|", " |_|", "|__ ", "|__ ", " / ", "|__|", "|__|", " "},
new String[] {"|__|", " | ", "|__ ", " __|", " |", " __|", "|__|", " / ", "|__|", " __|", " . "}
};
int hour = 12;
int min = 7;
System.out.println(
d[0][hour/10] + s + d[0][hour%10] + s + d[0][10] + s + d[0][min/10] + s + d[0][min%10] + "\n" +
d[1][hour/10] + s + d[1][hour%10] + s + d[1][10] + s + d[1][min/10] + s + d[1][min%10] + "\n" +
d[2][hour/10] + s + d[2][hour%10] + s + d[2][10] + s + d[2][min/10] + s + d[2][min%10] + "\n"
);
产生：
__ . __
| __| |_| |__|
| |__ . | __|
我正在尝试将当前时间放入一个 L.E.D.-like 输出中，并且每次都能够手动生成；但我很难自动显示当前时间。
在当前输出中，我有四个单独字符串的时间和 L.E.D 中的时间输出。格式：
0
-7
5
6
_
| |
|_|
__ . __
| __| |_| __|
| |__ . | __|
我下面的代码解释得更好。抱歉造成混淆。
import java.util.Calendar;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class main {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//get current hour
DateFormat dateFormat = new SimpleDateFormat("HH");
Date date = new Date();
String hour = dateFormat.format(date);
int hr = Integer.parseInt(hour);
//Separate hour into two int's
int f = hr-12;
int y = f / 10;
int u = f % 10;
//get current minutes
DateFormat dfm = new SimpleDateFormat("mm");
Date dm = new Date();
String min = dfm.format(dm);
int mn = Integer.parseInt(min);
//Separate minutes into two int's
int a = mn;
int i = a / 10;
int o = a % 10;
//print the time respectively
System.out.println(y);
System.out.println(u);
System.out.println(i);
System.out.println(o);
//characters to write the numbers
String text = " . ";
String t = "_";
String l = "|";
String sp = " ";
String br = "\n";
//top middle and bottom characters
String t0 = sp+sp+t+sp+sp;
String m0 = sp+l+sp+l+sp;
String b0 = sp+l+t+l+sp;
//Ex: System.out.println(t0+br+m0+br+b0); would print the number 0 in led output
System.out.println(t0+br+m0+br+b0);
String t1 = sp+sp+sp+sp+sp;
String m1 = sp+sp+sp+l+sp;
String b1 = sp+sp+sp+l+sp;
String t2 = sp+t+t+sp+sp;
String m2 = sp+t+t+l+sp;
String b2 = l+t+t+sp+sp;
String t3 = sp+t+t+sp+sp;
String m3 = sp+t+t+l+sp;
String b3 = sp+t+t+l+sp;
String t4 = sp+sp+sp+sp+sp;
String m4 = sp+l+t+l+sp;
String b4 = sp+sp+sp+l+sp;
String t5 = sp+sp+t+t+sp;
String m5 = sp+l+t+sp+sp;
String b5 = sp+t+t+l+sp;
String t6 = sp+sp+t+sp+sp;
String m6 = sp+l+t+sp+sp;
String b6 = sp+l+t+l+sp;
String t7 = sp+t+t+sp+sp;
String m7 = sp+sp+sp+l+sp;
String b7 = sp+sp+sp+l+sp;
String t8 = sp+sp+t+sp+sp;
String m8 = sp+l+t+l+sp;
String b8 = sp+l+t+l+sp;
String t9 = sp+sp+t+sp+sp;
String m9 = sp+l+t+l+sp;
String b9 = sp+sp+sp+l+sp;
// My attempt to change the int's from the current date into variables for their output
if (y == 0) {
String a1 = t0;
String a2 = m0;
String a3 = b0;
} else if (y == 1) {
String a1 = t1;
String a2 = m1;
String a3 = b1;
} else if (y == 2) {
String a1 = t2;
String a2 = m2;
String a3 = b2;
} else if (y == 3) {
String a1 = t3;
String a2 = m3;
String a3 = b3;
} else if (y == 4) {
String a1 = t4;
String a2 = m4;
String a3 = b4;
} else if (y == 5) {
String a1 = t5;
String a2 = m5;
String a3 = b5;
} else if (y == 6) {
String a1 = t6;
String a2 = m6;
String a3 = b6;
} else if (y == 7) {
String a1 = t7;
String a2 = m7;
String a3 = b7;
} else if (y == 8) {
String a1 = t8;
String a2 = m8;
String a3 = b8;
} else if (y == 9) {
String a1 = t9;
String a2 = m9;
String a3 = b9;
} else {
String too = "F";
}
if (u == 0) {
String x1 = t0;
String x2 = m0;
String x3 = b0;
} else if (u == 1) {
String x1 = t1;
String x2 = m1;
String x3 = b1;
} else if (u == 2) {
String x1 = t2;
String x2 = m2;
String x3 = b2;
} else if (u == 3) {
String x1 = t3;
String x2 = m3;
String x3 = b3;
} else if (u == 4) {
String x1 = t4;
String x2 = m4;
String x3 = b4;
} else if (u == 5) {
String x1 = t5;
String x2 = m5;
String x3 = b5;
} else if (u == 6) {
String x1 = t6;
String x2 = m6;
String x3 = b6;
} else if (u == 7) {
String x1 = t7;
String x2 = m7;
String x3 = b7;
} else if (u == 8) {
String x1 = t8;
String x2 = m8;
String x3 = b8;
} else if (u == 9) {
String x1 = t9;
String x2 = m9;
String x3 = b9;
} else {
String x1 = t9;
String x2 = m9;
String x3 = b9;
}
//The set up to print 12:43 in led format
//i would like to remove this so i can display the current time but i get errors
String a1 = t1;
String x1 = t2;
String c1 = text;
String d1 = t4;
String e1 = t3;
String a2 = m1;
String x2 = m2;
String c2 = " ";
String d2 = m4;
String e2 = m3;
String a3 = b1;
String x3 = b2;
String c3 = text;
String d3 = b4;
String e3 = b3;
//using the setup to display the time
String time= a1+x1+c1+d1+e1+br+a2+x2+c2+d2+e2+br+a3+x3+c3+d3+e3;
//printing the time
System.out.println(time);
}
}
一个更易读的版本如何做同样的事情（想想写一个通读你的代码的版本会更容易:)...
String s = " ";
String[][] d = new String[][] {
new String[] {" __ ", " ", " __ ", " __ ", " ", " __ ", " __ ", " __ ", " __ ", " __ ", " . "},
new String[] {"| |", " | ", " __|", " __|", " |_|", "|__ ", "|__ ", " / ", "|__|", "|__|", " "},
new String[] {"|__|", " | ", "|__ ", " __|", " |", " __|", "|__|", " / ", "|__|", " __|", " . "}
};
int hour = 12;
int min = 7;
System.out.println(
d[0][hour/10] + s + d[0][hour%10] + s + d[0][10] + s + d[0][min/10] + s + d[0][min%10] + "\n" +
d[1][hour/10] + s + d[1][hour%10] + s + d[1][10] + s + d[1][min/10] + s + d[1][min%10] + "\n" +
d[2][hour/10] + s + d[2][hour%10] + s + d[2][10] + s + d[2][min/10] + s + d[2][min%10] + "\n"
);
产生：
__ . __
| __| |_| |__|
| |__ . | __|