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POHow to find string within a string using for loop in java?
 

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  1. POHow to find string within a string using for loop in java?
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    <p>I'm trying to find if user input <code>s</code> contains the second user input <code>s1</code> using for loops and if statements. I only want to use methods <code>.charAt()</code> and <code>.length</code> and not <code>.indexOf</code> to find if s1 is within s. Once I find whether <code>s</code> contains <code>s1</code> or not, I either want to return <code>.charAt()</code> where <code>s1</code> begins in <code>s</code>, or return <code>-1</code> if <code>s1</code> doesn't occur at all inside <code>s</code>.</p> <p>For example, <code>s = abcdefghi</code> &amp; <code>s1 = def</code>, it will return <code>3</code>.</p> <p>This is my code so far: It either returns <code>0</code> or <code>-1</code></p> <pre><code>package javaapplication5; import java.util.Scanner; class myStrings { String s, s1; void setMyStrings(String str, String str1) { s = str; s1 = str1; } int find() { int i, j; int r = -1; char ns = s1.charAt(0); int sp; int count = 1; for (i = 0; i &lt; s.length(); i++){ if (s.charAt(i) == ns) { sp = i;//starting point for (j = i+1; j &lt; s1.length(); j++) { ns += 1; if (s.charAt(j) == ns){ j++; count++; } if (count == s1.length()) r = sp; } } } System.out.println(r); return r; } } public class JavaApplication5 { public static void main(String[] args) { Scanner in = new Scanner(System.in); myStrings setS = new myStrings(); String s, s1; System.out.print("Enter s:"); s = in.nextLine(); System.out.print("Enter s1:"); s1 = in.nextLine(); setS.setMyStrings(s1, s1); setS.find(); } </code></pre> <p>}</p>
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