public class StringCheker{
public static void main(String args[]){
Boolean;
boolean s1 = "Stephen";
boolean s2 = "songmuang s.";
boolean s3 = "9";
boolean s4 = "S";
System.out.println(s1.hasLowerCase);
System.out.println(s2.hasUpperCase);
System.out.println(s2.hasWhitespace);
System.out.println(s3.isDigit);
System.out.println(s4.isDigit);
System.out.println(s4.toLowerCase);}}

ผลที่ได้
---------- Compile ----------
StringCheker.java:3: error: not a statement
Boolean;
^
1 error

Output completed (0 sec consumed) - Normal Termination

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