Java String Example
String in Java
Strings Example
Example 1:
Get first two characters of any Stringpublic String firstTwo(String str) { if (str.length() >= 2) { return str.substring(0, 2); } else { return str; } // Solution notes: need an if/else structure to call substring if the length // is 2 or more, and otherwise return the string itself }
Alternative example of getting first two characters of any strings
public String firstTwo(String str) { if (str.length() >= 2) { char s = str.charAt(0); char s1 = str.charAt(1); String string = String.valueOf(s) + s1; return string; } return str; }
Example 2:
get last two characters of any stringpublic static void main(String[] args) { String str = "hello"; System.out.println(str.substring(str.length()-2)); }
Example 3:
Given a string of even length, return the first half. So the string "WooHoo" yields "Woo".public String firstHalf(String str) { return str.substring(0,(str.length())/2); }
Example 4:
Given a string, return a new version without the first and last characterpublic String withoutEnd(String str) { return str.substring(1,str.length()-1); }
Example 5:
Given 2 strings, a and b, return a string of the form short+long+short, with the shorter string on the outside and the longer string on the insidepublic String comboString(String a, String b) { int a1 = a.length(); int b1 = b.length(); if(a1 > b1){ return b+a+b; } return a+b+a; }
Example 6:
Given 2 strings, return their concatenation, except omit the first char of each.public String nonStart(String a, String b) { String s = a.substring(1,a.length()); String s1 = b.substring(1,b.length()); return s+s1; }
Example 7:
Given a string, return a "rotated left 2" version where the first 2 chars are moved to the endpublic String left2(String str) { if (str.length() >= 2) { String s = str.substring(0, 2); String s1 = str.substring(2, str.length()); return s1+s; } return str; }
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