help with this code in java please Given a string return the first character in the string

help with this code in java please 

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Given a string return the first character in the string if it contains more than 4 characters, and the last character otherwise. firstOrLastChar("kwk") firstOrLastChar("gals") firstOrLastChar("uocrws") For example: Test → 'k' →→→ 's' →'u' System.out.println(first0rLastChar("xdylp")); x Answer: (penalty regime: 0, 10, 20, 50, ... %) Result Reset answer 1 public String 2 // TODO your code goes here 3} firstOrLastChar(String str) { Given a string return the first character in the string if it contains more than 4 characters, and the last character otherwise. firstOrLastChar("kwk") firstOrLastChar("gals") firstOrLastChar("uocrws") For example: Test → 'k' →→→ 's' →'u' System.out.println(first0rLastChar("xdylp")); x Answer: (penalty regime: 0, 10, 20, 50, ... %) Result Reset answer 1 public String 2 // TODO your code goes here 3} firstOrLastChar(String str) {

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