Reverse123
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This document contains code to reverse an integer number and test the reverse method. The reverse method takes an integer as input, initializes a result variable to 0, uses modulo and division to extract the ones place digit and add it to the result multiplied by 10, and recursively calls itself until the number is 0, at which point result contains the reversed number. The test method creates an instance of the Eval class, calls the reverse method passing 123, and asserts that the result is 321, testing that the reverse method works correctly.
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![Reverse a no:
package test;
public class Eval {
public static void main(String[] args) {
// TODO Auto-generated method stub
}
public int reverse(int n)
{
int result = 0;
int rem;
while (n > 0)
{
rem = n % 10;
n = n / 10;
result = result * 10 + rem;
}
return result;
}
}
package test;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
public class EvalTest {
@BeforeClass](https://image.slidesharecdn.com/reverse123-150331230553-conversion-gate01/85/Reverse123-1-320.jpg)
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Reverse123
- 1. Reverse a no: package test; public class Eval { public static void main(String[] args) { // TODO Auto-generated method stub } public int reverse(int n) { int result = 0; int rem; while (n > 0) { rem = n % 10; n = n / 10; result = result * 10 + rem; } return result; } } package test; import static org.junit.Assert.*; import org.junit.Before; import org.junit.BeforeClass; import org.junit.Test; public class EvalTest { @BeforeClass
- 2. public static void setUpBeforeClass() throws Exception { } @Before public void setUp() throws Exception { } @Test public void testReverse() { Eval ob=new Eval(); int result1=ob.reverse(123); assertEquals(321,result1); } }