Commit724ff7e

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Add Hexadecimal to binary conversion

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src
- main/java/com/conversions
  - HexadecimalToBinary.java
- test/java/com/conversions
  - HexadecimalToBinaryTest.java

+70

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Lines changed: 48 additions & 0 deletions

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	`1`	`+packagecom.conversions;`
	`2`	`+`
	`3`	`+publicclassHexadecimalToBinary {`
	`4`	`+/**`
	`5`	`+ * This method converts a hexadecimal number to`
	`6`	`+ * a binary number.`
	`7`	`+ *`
	`8`	`+ * @param hexStr The hexadecimal number`
	`9`	`+ * @return The binary number`
	`10`	`+ */`
	`11`	`+`
	`12`	`+publicStringhexToBin (StringhexStr) {`
	`13`	`+`
	`14`	`+StringbinaryString ="",hexaNumbers ="0123456789ABCDEF";`
	`15`	`+intindexOfHex,decimalNumber =0,k =1;`
	`16`	`+charletter;`
	`17`	`+intbinaryArray[] =newint [50];`
	`18`	`+`
	`19`	`+hexStr =hexStr.toUpperCase();`
	`20`	`+`
	`21`	`+/**`
	`22`	`+ * Transform the hexadecimal number to decimal number`
	`23`	`+ */`
	`24`	`+for (inti =0 ;i <hexStr.length();i++) {`
	`25`	`+letter =hexStr.charAt(i);`
	`26`	`+indexOfHex =hexaNumbers.indexOf(letter);`
	`27`	`+decimalNumber =16 *decimalNumber +indexOfHex;`
	`28`	`+}`
	`29`	`+`
	`30`	`+/**`
	`31`	`+ * Transform decimal number to binary and put it in an array`
	`32`	`+ */`
	`33`	`+while (decimalNumber !=0) {`
	`34`	`+binaryArray[k++] =decimalNumber %2;`
	`35`	`+decimalNumber =decimalNumber /2;`
	`36`	`+}`
	`37`	`+/**`
	`38`	`+ * Put the binary in a string`
	`39`	`+ */`
	`40`	`+for (intj =k-1 ;j>0 ;j--) {`
	`41`	`+binaryString =binaryString +binaryArray[j];`
	`42`	`+}`
	`43`	`+`
	`44`	`+returnbinaryString;`
	`45`	`+`
	`46`	`+}`
	`47`	`+`
	`48`	`+}`

Lines changed: 22 additions & 0 deletions

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	`1`	`+packagecom.conversions;`
	`2`	`+`
	`3`	`+importstaticorg.junit.jupiter.api.Assertions.*;`
	`4`	`+`
	`5`	`+importorg.junit.jupiter.api.Assertions;`
	`6`	`+importorg.junit.jupiter.api.Test;`
	`7`	`+`
	`8`	`+classHexadecimalToBinaryTest {`
	`9`	`+`
	`10`	`+@Test`
	`11`	`+voidtest() {`
	`12`	`+HexadecimalToBinaryhexadecimalToBinary =newHexadecimalToBinary();`
	`13`	`+Assertions.assertEquals("10101011",hexadecimalToBinary.hexToBin("AB"),"Incorrect Conversion");`
	`14`	`+Assertions.assertEquals("10101101010101111001101",hexadecimalToBinary.hexToBin("56ABCD"),"Incorrect Conversion");`
	`15`	`+Assertions.assertEquals("10011101111011010001001",hexadecimalToBinary.hexToBin("4ef689"),"Incorrect Conversion");`
	`16`	`+Assertions.assertEquals("10011101111",hexadecimalToBinary.hexToBin("4EF"),"Incorrect Conversion");`
	`17`	`+Assertions.assertEquals("101010111100110111101111",hexadecimalToBinary.hexToBin("ABCDEF"),"Incorrect Conversion");`
	`18`	`+//It returns -1 if you enter a wrong hexaDecimal`
	`19`	`+Assertions.assertEquals("-1",hexadecimalToBinary.hexToBin("K"),"Incorrect Conversion");`
	`20`	`+}`
	`21`	`+`
	`22`	`+}`

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