Error(s), warning(s):

source_file.java:9: error: ';' expected
    public static void main(String args[])
                                          ^
source_file.java:16: error: <identifier> expected
    system.outtprintln(“Base Mayor”);
                      ^
source_file.java:16: error: illegal character: '\u201c'
    system.outtprintln(“Base Mayor”);
                       ^
source_file.java:16: error: illegal character: '\u201d'
    system.outtprintln(“Base Mayor”);
                                  ^
source_file.java:16: error: ';' expected
    system.outtprintln(“Base Mayor”);
                                   ^
source_file.java:17: error: <identifier> expected
    base = entrada.nextint();
        ^
source_file.java:19: error: <identifier> expected
    System.outprintln(Base menor”);
                     ^
source_file.java:19: error: illegal character: '\u201d'
    System.outprintln(Base menor”);
                                ^
source_file.java:19: error: illegal start of type
    System.outprintln(Base menor”);
                                 ^
source_file.java:19: error: <identifier> expected
    System.outprintln(Base menor”);
                                  ^
source_file.java:19: error: ';' expected
    System.outprintln(Base menor”);
                                   ^
source_file.java:20: error: illegal start of type
    base = entrada.nextint();
         ^
source_file.java:20: error: ';' expected
    base = entrada.nextint();
                  ^
source_file.java:20: error: invalid method declaration; return type required
    base = entrada.nextint();
                   ^
source_file.java:22: error: <identifier> expected
    system.outprintln(“Altura”)
                     ^
source_file.java:22: error: illegal character: '\u201c'
    system.outprintln(“Altura”)
                      ^
source_file.java:22: error: illegal character: '\u201d'
    system.outprintln(“Altura”)
                             ^
source_file.java:23: error: <identifier> expected
        Altura = entrada.nextint();
              ^
source_file.java:23: error: ';' expected
        Altura = entrada.nextint();
                ^
source_file.java:23: error: illegal start of type
        Altura = entrada.nextint();
                        ^
source_file.java:25: error: <identifier> expected
    resultado = (((base+Base)*(altura)))/2;
             ^
source_file.java:26: error: <identifier> expected
    system.outprintl(”resultado = ” + resultado)”
                    ^
source_file.java:26: error: illegal character: '\u201d'
    system.outprintl(”resultado = ” + resultado)”
                     ^
source_file.java:26: error: illegal start of type
    system.outprintl(”resultado = ” + resultado)”
                                ^
source_file.java:26: error: illegal character: '\u201d'
    system.outprintl(”resultado = ” + resultado)”
                                  ^
source_file.java:26: error: ';' expected
    system.outprintl(”resultado = ” + resultado)”
                                   ^
source_file.java:26: error: <identifier> expected
    system.outprintl(”resultado = ” + resultado)”
                                               ^
source_file.java:26: error: illegal character: '\u201d'
    system.outprintl(”resultado = ” + resultado)”
                                                ^
source_file.java:29: error: <identifier> expected
        System.out.println("Hello, World!");
                          ^
source_file.java:29: error: illegal start of type
        System.out.println("Hello, World!");
                           ^
source_file.java:31: error: class, interface, or enum expected
}
^
31 errors