Java: Get the last index of a string within a string

Last update on December 21 2024 09:43:33 (UTC/GMT +8 hours)

Write a Java program to get the last index of a string within a string.

Sample string of all alphabet: "The quick brown fox jumps over the lazy dog."

Visual Presentation:

Sample Solution:

Java Code:

// Define a public class named Exercise21.
public class Exercise21 {
    // Define the main method.
    public static void main(String[] args) {
        // Declare and initialize a string variable.
        String str = "The quick brown fox jumps over the lazy dog.";

        // Get the index of all the characters of the alphabet
        // starting from the end of the String towards the beginning.
        int a = str.lastIndexOf("a", str.length() - 1);
        int b = str.lastIndexOf("b", str.length() - 1);
        int c = str.lastIndexOf("c", str.length() - 1);
        int d = str.lastIndexOf("d", str.length() - 1);
        int e = str.lastIndexOf("e", str.length() - 1);
        int f = str.lastIndexOf("f", str.length() - 1);
        int g = str.lastIndexOf("g", str.length() - 1);
        int h = str.lastIndexOf("h", str.length() - 1);
        int i = str.lastIndexOf("i", str.length() - 1);
        int j = str.lastIndexOf("j", str.length() - 1);
        int k = str.lastIndexOf("k", str.length() - 1);
        int l = str.lastIndexOf("l", str.length() - 1);
        int m = str.lastIndexOf("m", str.length() - 1);
        int n = str.lastIndexOf("n", str.length() - 1);
        int o = str.lastIndexOf("o", str.length() - 1);
        int p = str.lastIndexOf("p", str.length() - 1);
        int q = str.lastIndexOf("q", str.length() - 1);
        int r = str.lastIndexOf("r", str.length() - 1);
        int s = str.lastIndexOf("s", str.length() - 1);
        int t = str.lastIndexOf("t", str.length() - 1);
        int u = str.lastIndexOf("u", str.length() - 1);
        int v = str.lastIndexOf("v", str.length() - 1);
        int w = str.lastIndexOf("w", str.length() - 1);
        int x = str.lastIndexOf("x", str.length() - 1);
        int y = str.lastIndexOf("y", str.length() - 1);
        int z = str.lastIndexOf("z", str.length() - 1);

        // Display the results of all the lastIndexOf method calls.
        System.out.println(" a  b c  d  e  f  g  h i  j");
        System.out.println("===========================");
        System.out.println(a + " " + b + " " + c + " " + d + " " +
                           e + " " + f + " " + g + " " + h + " " +
                           i + " " + j + "\n");

        System.out.println("k  l  m  n  o  p q  r  s  t");
        System.out.println("===========================");
        System.out.println(k + " " + l + " " + m + " " + n + " " +
                           o + " " + p + " " + q + " " + r + " " +
                           s + " " + t + "\n");

        System.out.println(" u  v  w  x  y  z");
        System.out.println("=================");
        System.out.println(u + " " + v + " " + w + " " + x + " " +
                           y + " " + z);
    }
}

Sample Output:

 a  b c  d  e  f  g  h i  j                                                                                   
===========================                                                                                   
36 10 7 40 33 16 42 32 6 20                                                                                   
                                                                                                              
k  l  m  n  o  p q  r  s  t                                                                                   
===========================                                                                                   
8 35 22 14 41 23 4 29 24 31                                                                                   
                                                                                                              
 u  v  w  x  y  z                                                                                             
=================                                                                                             
21 27 13 18 38 37

Flowchart:

Java Code Editor:

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