how to calculate min, max and average and write the output into into a text file in java
package TrialPrograms;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
public class Test {
public static void main(String[] args) throws IOException {
FileInputStream fi = new FileInputStream("F:\\Test\\file.txt");
FileOutputStream fo = new FileOutputStream("F:\\Test\\output.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fi));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fo));
String strLine;
while ((strLine = br.readLine()) != null) {
String[] arr = strLine.split(" ");
String[] nos = arr[1].split(",");
Set<Integer> set = new HashSet<Integer>();
for(int i = 0; i<nos.length; i++){
int no = Integer.parseInt(nos[i]);
set.add(no);
}
TreeSet<Integer> sortedSet = new TreeSet<Integer>(set);
switch(arr[0]) {
case "Min:":
String msg1="The Min of [" +arr[1]+ "] is " +(Integer)sortedSet.first();
bw.write(msg1);
bw.newLine();
break;
case "Max:":
String msg2="The Max of [" +arr[1]+ "] is " +(Integer)sortedSet.last();
bw.write(msg2);
bw.newLine();
break;
case "Avg:":
Object[] noarray = sortedSet.toArray();
int noarraysize = noarray.length-1;
int sum=0;
for(int i=0;i<=noarraysize;i++) {
int no=Integer.valueOf(noarray[i].toString());
sum = sum + no;
if(i==noarraysize) {
String msg3="The Avg of [" +arr[1]+ "] is " +(double)sum/noarray.length;
bw.write(msg3);
bw.newLine();
}
}
break;
case "Sum:":
Object[] noarray1 = sortedSet.toArray();
int noarraysize1 = noarray1.length-1;
int sum1=0;
for(int i=0;i<=noarraysize1;i++) {
int no=Integer.valueOf(noarray1[i].toString());
sum1 = sum1 + no;
if(i==noarraysize1) {
String msg4="The Sum of [" +arr[1]+ "] is " +sum1;
bw.write(msg4);
bw.newLine();
}
}
break;
}
}
br.close();
bw.close();
}
}
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6
import java.io.File;
import java.util.Formatter;
import java.util.Scanner;
public class ExternalData {
public static void main(String[] args) {
try {
System.out.print("Enter the file name with extension : ");
Scanner input = new Scanner(System.in);
File file = new File(input.nextLine());
input = new Scanner(file);
while (input.hasNextLine()) {
int min = input.nextInt();
while(input.hasNextInt());
int num = input.nextInt();
if(num < min) {
min = num;
}
while (input.hasNextLine()) {
int max = input.nextInt();
while(input.hasNextInt());
int num2 = input.nextInt();
if(num2 > min) {
min = num;
String avg = input.nextLine();
Formatter f = new Formatter("C:\\Users\\Kevin\\Dropbox\\Kevin
Carter-8042\\Intro to Soft Eng\\Task 12\\outputTest.txt");
// print the formatted strings to the file
f.format("The min of [1,2,3,4,5,6] is " + min);
f.format("\n\nThe max of [1,2,3,4,5,6] is " + max);
f.format("\n\nThe avg of [1,2,3,4,5,6] is " + avg);
f.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
Thank you!
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