public static void main(String[] args) {
String A = " AAA \n"
+ " A:::A \n"
+ " A:::::A \n"
+ " A:::::::A \n"
+ " A:::::::::A \n"
+ " A:::::A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::AAAAAAAAA:::::A \n"
+ " A:::::::::::::::::::::A \n"
+ " A:::::AAAAAAAAAAAAA:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ "AAAAAAA AAAAAAA";
String B = "\nBBBBBBBBBBBBBBBBB \n"
+ "B::::::::::::::::B \n"
+ "B::::::BBBBBB:::::B \n"
+ "BB:::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::BBBBBB:::::B \n"
+ " B:::::::::::::BB \n"
+ " B::::BBBBBB:::::B \n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ "BB:::::BBBBBB::::::B\n"
+ "B:::::::::::::::::B \n"
+ "B::::::::::::::::B \n"
+ "BBBBBBBBBBBBBBBBB ";
System.out.print(A);
System.out.print(B);
}
}
here's a simplified version of what im trying to do, when I run it A appears on top of B, I want A and B to print out beside each other but I have no clue how. very new to this, probably a stupid question but i cant find anything on the web so I'm hoping someone here can help me out
you can use \n to determine each line and print it side by side:
final String[] aa = A.split("\n");
final String[] ba = B.split("\n");
IntStream.range(0, aa.length).forEach((int idx) -> System.out.printf("%s %s\n", aa[idx], ba[idx]));
If you split each character into lines, you can then iterate over the number of lines and print them "in parallel." A much simpler example follows.
class Test {
public static void main(String[] args) {
String box1 = "+-+\n" +
"| |\n" +
"+-+";
String box2 = "+-+\n" +
"|x|\n" +
"+-+";
String[] lines1 = box1.split("\n");
String[] lines2 = box2.split("\n");
for (int i = 0; i < lines1.length; i++) {
System.out.printf("%s %s\n", lines1[i], lines2[i]);
}
}
}
According to the Information that i have to this case, i could suggest you a Souloution like this.
This is maybe not the prettiest soloution, but it is simple to understand, and it works.
public class Main {
public static void main(String[] args) {
String A = " AAA \n"
+ " A:::A \n"
+ " A:::::A \n"
+ " A:::::::A \n"
+ " A:::::::::A \n"
+ " A:::::A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::AAAAAAAAA:::::A \n"
+ " A:::::::::::::::::::::A \n"
+ " A:::::AAAAAAAAAAAAA:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ " A:::::A A:::::A \n"
+ "AAAAAAA AAAAAAA";
String B = "\nBBBBBBBBBBBBBBBBB \n"
+ "B::::::::::::::::B \n"
+ "B::::::BBBBBB:::::B \n"
+ "BB:::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::BBBBBB:::::B \n"
+ " B:::::::::::::BB \n"
+ " B::::BBBBBB:::::B \n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ " B::::B B:::::B\n"
+ "BB:::::BBBBBB::::::B\n"
+ "B:::::::::::::::::B \n"
+ "B::::::::::::::::B \n"
+ "BBBBBBBBBBBBBBBBB ";
List<String> arrayA = List.of(A.split("\n"));
List<String> arrayB = List.of(B.split("\n"));
for(int i = 0; i < arrayA.size(); i++){
System.out.println(arrayA.get(i)+arrayB.get(i));
}
}
I want to change the firstPattern with the secondPattern. When I am using Pattern Matcher / String.replaceAll()
I am using the following logic to replace
System.out.println(fileContent.replaceAll(firstPattern, secondPattern));
I am getting following error =
at java.util.regex.Pattern.error(Pattern.java:1955)
at java.util.regex.Pattern.closure(Pattern.java:3157)
at java.util.regex.Pattern.sequence(Pattern.java:2134)
at java.util.regex.Pattern.expr(Pattern.java:1996)
at java.util.regex.Pattern.compile(Pattern.java:1696)
at java.util.regex.Pattern.<init>(Pattern.java:1351)
at java.util.regex.Pattern.compile(Pattern.java:1028)
at java.lang.String.replaceAll(String.java:2223)
It is happening because in the first pattern I have used "{" and "}" brace. So it is throwing an error. Don't know how to replace these.
String firstPattern = "text.append(\" where \");\r\n" +
" text.append(\"ObjId\" + \" = \");\r\n" +
" text.append(getObjId().toString());\r\n" +
"\r\n" +
" text.append(\" and \");\r\n" +
" text.append(\" LastCngDTime = \");\r\n" +
"\r\n" +
" try {\r\n" +
" tempString = dbaExecObj.Get_DataConverter()\r\n" +
" .SmsTimeStampToDBMSTimestampString(LastCngDTime,\r\n" +
" \"-WQ\");\r\n" +
" } catch (Exception e) {\r\n" +
" throw new SmsTntResult(new SmsSystemResult(logger,\r\n" +
" SmsCsvWhoAmI.getMyFullyQualifiedMethodName(),\r\n" +
" SmsTntCodes.DATA_TYPE_CONVERSION_ERROR,\r\n" +
" SmsSystemResult.ERROR));\r\n" +
" }\r\n" +
"\r\n" +
" text.append(tempString);";
String secondPattern = "text.append(\" where \");\r\n" +
" text.append(\"ObjId\" + \" = \");\r\n" +
" text.append(getObjId().toString());\r\n" +
"\r\n" +
" text.append(\" and \");\r\n" +
" text.append(\" LastCngDTime = \");\r\n" +
"\r\n" +
" try {\r\n" +
" tempString = dbaExecObj.Get_DataConverter()\r\n" +
" .SmsTimeStampToDBMSTimestampString(LastCngDTime,\r\n" +
" \"-WQ\");\r\n" +
" } catch (Exception e) {\r\n" +
" throw new SmsTntResult(new SmsSystemResult(logger,\r\n" +
" SmsCsvWhoAmI.getMyFullyQualifiedMethodName(),\r\n" +
" SmsTntCodes.DATA_TYPE_CONVERSION_ERROR,\r\n" +
" SmsSystemResult.ERROR));\r\n" +
" }\r\n" +
"\r\n" +
" text.append(\"CAST(\");" +
" text.append(tempString);" +
" text.append(\" AS datetime)\");";
String fileContent = new Scanner(new File(filePath)).useDelimiter("\\A").next();
System.out.println(fileContent.replaceAll(firstPattern, secondPattern));
I'm trying to create another array but I want it to be the array double gainT[], which is the temperature in Fahrenheit, converted to Celcius to make another array called double gainTC[]. I am also trying to do the same thing but with the precipitation. I just can't seem to find a way to do it though.
import java.io.IOException;
import java.util.Scanner;
public class AnnualClimate1 {
public static void main(String [] args) throws IOException
{
Scanner in = new Scanner(System.in);
System.out.print("Choose the temperature Scale (F = Fahrenheit, C = Celsius): ");
String tFC = in.nextLine();
System.out.print("Choose the precipitation Scale (I = Inches, C = Centimeters): ");
String pIC = in.nextLine();
System.out.println("");
System.out.println("");
System.out.println(" Climate Data");
System.out.println(" Location: Gainesville, Florida");
System.out.println(" Temperature " + tFC + " Precipitation " + pIC);
System.out.println("=================================================");
double gainT[]={54.3, 57.0, 62.5, 67.6, 74.3, 79.2, 80.9, 80.4, 77.8, 70.1, 62.8, 56.3};
double gainTC[] = {(gainT[] - 32) / 1.8};
double gainP[]={3.5, 3.4, 4.3, 2.9, 3.2, 6.8, 6.1, 6.6, 4.4, 2.5, 2.2, 2.6};
double gainPC[] = {gainP[] / .3937};
if(tFC.equalsIgnoreCase("F") && pIC.equalsIgnoreCase("I")){
System.out.println("Jan. " + gainT[1] + " " + gainP[1]);
System.out.println("Feb. " + gainT[2] + " " + gainP[2]);
System.out.println("Mar. " + gainT[3] + " " + gainP[3]);
System.out.println("Apr. " + gainT[4] + " " + gainP[4]);
System.out.println("May " + gainT[5] + " " + gainP[5]);
System.out.println("Jun. " + gainT[6] + " " + gainP[6]);
System.out.println("Jul. " + gainT[7] + " " + gainP[7]);
System.out.println("Aug. " + gainT[8] + " " + gainP[8]);
System.out.println("Sep. " + gainT[9] + " " + gainP[9]);
System.out.println("Oct. " + gainT[10] + " " + gainP[10]);
System.out.println("Nov. " + gainT[11] + " " + gainP[11]);
System.out.println("Dec. " + gainT[12] + " " + gainP[12]);
}
else if(tFC.equalsIgnoreCase("C") && pIC.equalsIgnoreCase("C")){
System.out.println("Jan. " + gainTC[1] + " " + gainPC[1]);
System.out.println("Feb. " + gainTC[2] + " " + gainPC[2]);
System.out.println("Mar. " + gainTC[3] + " " + gainPC[3]);
System.out.println("Apr. " + gainTC[4] + " " + gainPC[4]);
System.out.println("May " + gainTC[5] + " " + gainPC[5]);
System.out.println("Jun. " + gainTC[6] + " " + gainPC[6]);
System.out.println("Jul. " + gainTC[7] + " " + gainPC[7]);
System.out.println("Aug. " + gainTC[8] + " " + gainPC[8]);
System.out.println("Sep. " + gainTC[9] + " " + gainPC[9]);
System.out.println("Oct. " + gainTC[10] + " " + gainPC[10]);
System.out.println("Nov. " + gainTC[11] + " " + gainPC[11]);
System.out.println("Dec. " + gainTC[12] + " " + gainPC[12]);
}
}
}
Here is an incomplete example so you can fill in the blanks yourself:
double gainT[]={54.3, 57.0, 62.5, 67.6, 74.3, 79.2, 80.9, 80.4, 77.8, 70.1, 62.8, 56.3};
double gainTC[] = new double[gainT.length]; //create array which matches the size of gainT
//array.length is a property value returning the 'size' or length or the array
//Now just iterate through all the gainT[] values you populated above and read each one
for(int i = 0; i < gainT.length; i++){
double math = //use your conversion math here, and store the value
gainTC[i] = math; //assign the results of your math to the same spot in the new array
}
If you'd like more information on Loops and Arrays, check here:
For Loops: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/for.html
Arrays: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html
I am learning java, and from what I can tell, what I am looking to do is a rare situation.
I am trying to use an API (kindof) to randomly generate musical notes. I want it to generate 20 times so i have it in a for loop. I realize that i could have used a list for this I just dont know how I could have implemented it. The question I have is, when I try to compile this code, the first part runs. It lets me make the seed. However after that it gives me
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
at co.kbcomp.music.Main.main(Main.java:64)
What could I do to prevent this? I know that what I am doing is wrong. That much I dont need to be told. What I want to know is where am I going wrong.
package co.kbcomp.music;
import java.util.*;
import org.jfugue.*;
import java.util.Scanner;
public class Main {
public static void main(String[] args){
Scanner in = new Scanner(System.in);
System.out.println("Please enter a number for the seed of the song");
long seed = in.nextLong();
Calendar cal = Calendar.getInstance();
Random rand;
//rand = new Random(cal.getTime());
rand = new Random(seed);
int NoteNumber = 0;
int NoteLength = 0;
int OctiveNumber = 0;
int ChordNumber = 0;
int InversionNumber = 0;
//int Duration = rand.nextInt(100 - 5) + 5;
//This keeps track of the iteration of the for loop.
String[] NN = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "};
String[] NL = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "};
String[] IN = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "};
String[] CN = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "};
String[] ON = { " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " "};
//This is what is being played
String[] note = { "A", "B", "C", "D", "E", "F", "G" };
String[] noteLength = {"", "w", "", "h", "", "q","", "i"};
String[] octive = { "","1","", "2", "", "3", "", "4", "", "5", "", "6", "", "7", "", "8", "", "9"};
String[] chord = { "", "maj", "", "min"};
String[] inversion = {"", "^", "", "^^", "", "^^^", "", "^^^^", "", "^^^^^"};
String[] key = {"",""};
String keys= " ";
String randstr = " ";
//this is the loop that defines the music legnth
for (int i = 0; i < 21; i++) {
NoteNumber = rand.nextInt(7);
NoteLength = rand.nextInt(8);
OctiveNumber = rand.nextInt(18);
ChordNumber = rand.nextInt(4);
InversionNumber = rand.nextInt(10);
NN[i] = note[NoteNumber]; // This randomly generates the note to be played.
NL[i] = noteLength[NoteLength]; // This randomly generates the length of the note.
ON[i] = octive[OctiveNumber]; // This defines the octive to be played in.
CN[i] = chord[ChordNumber]; // This is defines the major or the minor
IN[i] = inversion[InversionNumber]; // IN[i] = inversion[InversionNumber];
key[i] = NN[i] + NL[i] + ON[i] + CN[i] + IN[i];
//randstr = c[0] + " " + c[1] + " " + c[2] + " " + c[3] + " " + c[4] + " " + c[5] + " " + c[6] + " " + c[7] + " " + c[8] + " " + c[9] + " " + c[10] + " " + c[11] + " " + c[12] + " " + c[13] + " " + c[14] + " " + c[15] + " " + c[16];
keys = (key[0] + " " + key[1] + " " + key[2] + " " + key[3] + " " + key[4] + " " + key[5] + " " + key[6] + " " + key[7] + " " + key[8] + " " + key[9] + " " + key[10] + " " + key[11] + " " + key[12] + " " + key[13] + " " + key[14] + " " + key[15] + " " + key[16] + " " + key[17] + " " + key[18] + " " + key[19] + " " + key[20]);
}
System.out.println(key);
Player player = new Player();
Pattern pattern = new Pattern(key[0]);
player.play(pattern);
}
}
You declare your key array with a length of two:
String[] key = {"",""};
But then later in your for loop, you try to access elements beyond the length of your array:
keys = (key[0] + " " + key[1] + " " + key[2] + " " + key[3] + " " + key[4] +
" " + key[5] + " " + key[6] + " " + key[7] + " " + key[8] + " " + key[9] +
" " + key[10] + " " + key[11] + " " + key[12] + " " + key[13] + " " +
key[14] + " " + key[15] + " " + key[16] + " " + key[17] + " " + key[18] +
" " + key[19] + " " + key[20]);
Since your array has only a length of two, when you try to access the third element (at array index 2), you get an ArrayIndexOutOfBoundsException.
String[] key = {"",""};
...
for (int i = 0; i < 21; i++) {
...
key[i] = ....
Do you see the problem?
As you array in only 20 in length
then this
for (int i = 0; i < 21; i++) {
is going to cause an overflow
It should be < 20
Plus this code is meaningless as your key is only an array of 2
keys = (key[0] + " " + key[1] + " " + key[2] + " " + key[3] + " " + key[4] + " " + key[5] + " " + key[6] + " " + key[7] + " " + key[8] + " " + key[9] + " " + key[10] + " " + key[11] + " " + key[12] + " " + key[13] + " " + key[14] + " " + key[15] + " " + key[16] + " " + key[17] + " " + key[18] + " " + key[19] + " " + key[20]);