字符串轉 Boolean 的正確方式

        String s1 = "false";
        String s2 = "true";
        String s3 = "fAlSe";
        String s4 = "TrUe";
        String s5 = "true_a";


   正確的方法     Boolean.parseBoolean(string s);

        System.out.println(Boolean.parseBoolean(s1));
        System.out.println(Boolean.parseBoolean(s2));
        System.out.println(Boolean.parseBoolean(s3));
        System.out.println(Boolean.parseBoolean(s4));
        System.out.println(Boolean.parseBoolean(s5));

結果是：
false
true
false
true
false


     錯誤的方法     Boolean.getBoolean(string s);  
                                                           
        System.out.println(Boolean.getBoolean(s1));
        System.out.println(Boolean.getBoolean(s2));
        System.out.println(Boolean.getBoolean(s3));
        System.out.println(Boolean.getBoolean(s4));
        System.out.println(Boolean.getBoolean(s5));


      以上5個的返回的值都為 false