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Core Java - Interview Questions and Answers for 'Java.lang' - 5 question(s) found - Order By Newest | ||||
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Ans. Using String method - new StringBuffer(str).reverse().toString(); Iterative - Strategy - Loop through each character of a String from last to first and append the character to StringBuilder / StringBuffer public static String getReverseString(String str){ StringBuffer strBuffer = new StringBuffer(str.length); for(int counter=str.length -1 ; counter>=0;counter--){ strBuffer.append(str.charAt(counter)); } return strBuffer; } Recursive - Strategy - Call the method with substring starting from 2nd character recursively till we have just 1 character. public static String getReverseString(String str){ if(str.length <= 1){ return str; } return (getReverseString(str.subString(1)) + str.charAt(0); } | ||||
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Ans. No, It is loaded by default by the JVM. | ||||
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Ans. http://www.buggybread.com/2015/01/java-javalang-classes-and-interfaces.html | ||||
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Ans. http://www.buggybread.com/2015/01/migrating-to-java-8-new-classes.html | ||||
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Ans. java.lang | ||||
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