Commitccf5065

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Add HexadecimalToDecimal conversion

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src
- main/java/com/conversions
  - HexadecimalToDecimal.java
- test/java/com/conversions
  - HexadecimalToDecimalTest.java

+60

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Lines changed: 37 additions & 0 deletions

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	`1`	`+packagecom.conversions;`
	`2`	`+`
	`3`	`+`
	`4`	`+publicclassHexadecimalToDecimal {`
	`5`	`+`
	`6`	`+/**`
	`7`	`+ * This method converts a Hexadecimal number to a decimal number`
	`8`	`+ *`
	`9`	`+ * @param hexadecimalStr`
	`10`	`+ * @return decimal number`
	`11`	`+ */`
	`12`	`+publicStringhexToDecimal(StringhexaStr) {`
	`13`	`+StringhexaNumbers ="0123456789ABCDEF";`
	`14`	`+intm,result =0;`
	`15`	`+charletter;`
	`16`	`+StringdecimalStr;`
	`17`	`+hexaStr =hexaStr.toUpperCase();`
	`18`	`+`
	`19`	`+for (inti =0 ;i <hexaStr.length() ;i++) {`
	`20`	`+/**`
	`21`	`+ * Letter will store the hexadecimal number as long as we loop through`
	`22`	`+ * the string`
	`23`	`+ */`
	`24`	`+letter =hexaStr.charAt(i);`
	`25`	`+`
	`26`	`+/**`
	`27`	`+ * m is the index of the number that we are looping through in the`
	`28`	`+ * hexaNumbers`
	`29`	`+ */`
	`30`	`+m =hexaNumbers.indexOf(letter);`
	`31`	`+result =16*result +m;`
	`32`	`+ }`
	`33`	`+`
	`34`	`+decimalStr =String.valueOf(result);`
	`35`	`+returndecimalStr ;`
	`36`	`+ }`
	`37`	`+}`

Lines changed: 23 additions & 0 deletions

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	`1`	`+packagecom.conversions;`
	`2`	`+`
	`3`	`+`
	`4`	`+importorg.junit.jupiter.api.Assertions;`
	`5`	`+importorg.junit.jupiter.api.Test;`
	`6`	`+`
	`7`	`+classHexadecimalToDecimalTest {`
	`8`	`+`
	`9`	`+@Test`
	`10`	`+voidtestHexadecimalToDecimalTest() {`
	`11`	`+`
	`12`	`+HexadecimalToDecimalhexadecimalToDecimal =newHexadecimalToDecimal();`
	`13`	`+Assertions.assertEquals("171",hexadecimalToDecimal.hexToDecimal("AB"),"Incorrect Conversion");`
	`14`	`+Assertions.assertEquals("5680077",hexadecimalToDecimal.hexToDecimal("56ABCD"),"Incorrect Conversion");`
	`15`	`+Assertions.assertEquals("5174921",hexadecimalToDecimal.hexToDecimal("4ef689"),"Incorrect Conversion");`
	`16`	`+Assertions.assertEquals("1263",hexadecimalToDecimal.hexToDecimal("4EF"),"Incorrect Conversion");`
	`17`	`+Assertions.assertEquals("11259375",hexadecimalToDecimal.hexToDecimal("ABCDEF"),"Incorrect Conversion");`
	`18`	`+//It returns -1 if you enter a wrong hexaDecimal`
	`19`	`+Assertions.assertEquals("-1",hexadecimalToDecimal.hexToDecimal("K"),"Incorrect Conversion");`
	`20`	`+`
	`21`	`+}`
	`22`	`+`
	`23`	`+}`

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