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Main.java
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Main.java
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import java.util.*;
import java.io.File; // Import the File class
import java.io.FileNotFoundException; // Import this class to handle errors
import java.util.Scanner; // Import the Scanner class to read text files
class Main {
static int min(int x, int y, int z)
{
if (x <= y && x <= z)
return x;
if (y <= x && y <= z)
return y;
else
return z;
}
static int editDistDP(String str1, String str2, int m,
int n)
{
// Create a table to store results of subproblems
int dp[][] = new int[m + 1][n + 1];
// Fill d[][] in bottom up manner backtracking
for (int i = 0; i <= m; i++) {
for (int j = 0; j <= n; j++) {
// If first string is empty, only option is
// to insert all characters of second string
if (i == 0)
dp[i][j] = j; // Min. operations = j
// If second string is empty, only option is
// to remove all characters of second string
else if (j == 0)
dp[i][j] = i; // Min. operations = i
// If last characters are same, ignore last
// char and recur for remaining string
else if (str1.charAt(i - 1)
== str2.charAt(j - 1))
dp[i][j] = dp[i - 1][j - 1];
// If the last character is different,
// consider all possibilities and find the
// minimum
else
dp[i][j] = 1
+ min(dp[i][j - 1], // Insert
dp[i - 1][j], // Remove
dp[i - 1]
[j - 1]); // Replace
}
}
return dp[m][n];
}
public static void main(String[] args){
try {
File myObj = new File("filename.txt");
File myObj2 = new File("filename2.txt");
Scanner myReader = new Scanner(myObj);
Scanner Reader = new Scanner(myObj2);
while (myReader.hasNextLine()) {
String data = myReader.nextLine();
String data2=Reader.nextLine();
System.out.println(editDistDP(data, data2,data.length(),data2.length()));
}
myReader.close();
Reader.close();
} catch (FileNotFoundException e) {
System.out.println("An error occurred.");
e.printStackTrace();
}
}
}