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Thread: '{' expected error please help

  1. #1
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    Default '{' expected error please help



  2. #2
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    Default Re: '{' expected error please help

    Quote Originally Posted by erdy_rezki View Post
    what should i do to solve this error ?
    Hello erdy_rezki!
    Can you post your code here? I saw some syntax errors in the attached photos but i can't be sure.
    Last edited by andreas90; April 9th, 2012 at 04:26 AM.

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    Default Re: '{' expected error please help

    Quote Originally Posted by andreas90 View Post
    Hello erdy_rezki!
    Can you post your code here? I saw some syntax errors in the attached photos but i can't be sure.
    yes of course andreas90 thanks before

    package toy;
    import java.io.*;
    public class MathExploreToy{
    /**create*/
    public class MathExploreToy(){
    }
    static void test {
    test E();
    testPI();
    testAbs();
    }
    static void betterTest(){
    testinAbs();

    }

    static void betterTest(){
    testIntAbs(){
    }
    static void test E
    System.out.println("Testing untuk math.E");
    System.out.println("Math.E= "+Math.E);
    System.out.println("");
    }

    static void test PI(){
    System.out.println("Testing untuk math.PI");

    System.out.println("Math.PI = "+Math.PI);
    System.out.println("");

    }
    static void testAbs(){
    System.out.println("Testing untuk Math.abs()");
    System.out.println("Math.abs(-23.7)="Math.abs(-23.7));
    System.out.println("Math.abs(0.0)="Math.abs(0.0));
    System.out.println("Math.abs(23.7)="Math.abs(23.7) ;
    System.out.println("Double.MIN_VALUE = "+Double.MIN.VALUE);
    System.out.println("Math.abs(Double.MIN_VALUE) ="Math.abs(Double.MIN_VALUE));
    System.out.println("Math.abs(-Double.MIN_VALUE) ="Math.abs(-Double.MIN_VALUE));
    System.out.println("Math.abs(Double.MAX_VALUE) ="+Double.MAX_VALUE);
    System.out.println("Math.abs(Double.MAX_VALUE) ="+Math.abs(Double.MAX_VALUE));
    System.out.println("Math.abs(-Double.MAX_VALUE)="+Math.abs(-Double.MAX_VALUE));
    System.out.println("");
    }

    static void testIntAbs(){
    System.out.println("cara pengujian yang lebih baik mendukung otomatisasi");
    System.out.println("Testing untuk Math.abs() bagi bilangan bulat");

    if (Math.abs(-23) !=23)System.out.println("Math(-23)::Error Hasil harus 23");
    else System.out.prinln(Math(-23):: Correct!");
    if (Math.abs(0) !=0)System.out.println("Math(0)::Error Hasil harus 0");
    else System.out.prinln(Math(0):: Correct!");
    if (Math.abs(23) !=23)System.out.println("Math(23)::Error Hasil harus 23");

    System.out.println("integer.MIN_VALUE) = "+integer.MIN_VALUE);
    System.out.println(Math.abs(Integer.MIN_VALUE) ="+math.abs(Integer.MIN_VALUE));
    System.out.println("integer.MAX_VALUE) = "+integer.MAX_VALUE);
    System.out.println(Math.abs(Integer.MAX_VALUE) ="+math.abs(Integer.MAX_VALUE));

    if (Math.abs(Integer.MIN_VALUE) != (-Integer.MIN_VALUE))
    System.out.println("Math(Integer.MIN_VALUE) :: Error!");
    else System.out.println("Math(Integer.MIN_VALUE) :: Correct!");
    if (Math.abs(Integer.MIN_VALUE) < 0)
    System.out.println("Math(Integer.MIN_VALUE) :: Error! hasil harus > 0");
    else System.out.println("Math(Integer.MIN_VALUE) :: Correct!");
    System.out.println("\n\nPERHATIAN!");
    System.out.println("Pengujian menunjukan hasil yang tidak sesuai dengan matematika\n"+"pada kondisi batas sangat sulit diprediksi, untuk itu kita harus mengacu dokumentasi bahasa\n"+
    "Pengujian otomatis kadang tidak dapat mengemukakan secara benar karena dibatasi juga\n"+
    "Oleh kemampuan bahasa itu sendiri bila kesalahan adalah pada spesifikasi bahasa itu sendiri!\n"+
    "Pengujian otomatis akan benar ditangan ahli, pengujian dapat ditambah abb\n"+
    "Berdasarkan kenyataan bahwa hasil fungsi abs tidak boleh kurang dari nol);
    System.out.println("\n"+ Di Java, Math.abs (Integer.MIN_VALUE) justru menghasilkan bilangan negatif.\n"+
    "melanggar rumus matematika dimana hasil fungsi absolut selalu bernilai positif. \n"+
    "Hasil ini dapat ditelusuri karena representasi int adalah two's complement \n"+
    "Versi yang dipakai penulis :: JDK 1.5");

    }

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    Default Re: '{' expected error please help

    error is in line 5,52,54,58,60,73,74,80
    erroe name: '{'expected , unclosed string lateral, unclosed string lateral, unclosed string lateral,unclosed string lateral, illegal character:\92, unclosed string lateral , '{'expected

  5. #5
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    Default Re: '{' expected error please help

    You have many syntax errors. Inside your public class MathExploreToy and then you write
    public class MathExploreToy(){
    }
    What is this? If you are trying to make a constructor this is not the appropriate way. Check again your curly braces and try fixing your errors and ask a specific question if you have. I suggest you reading the java tutorials for defining methods.
    And please use the highlight tags for better readability.

  6. The Following User Says Thank You to andreas90 For This Useful Post:

    erdy_rezki (April 9th, 2012)

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    Default Re: '{' expected error please help

    okay thanks for your comments its really good for my learning

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    Default Re: '{' expected error please help

    Quote Originally Posted by andreas90 View Post
    You have many syntax errors. Inside your public class MathExploreToy and then you write
    public class MathExploreToy(){
    }
    What is this? If you are trying to make a constructor this is not the appropriate way. Check again your curly braces and try fixing your errors and ask a specific question if you have. I suggest you reading the java tutorials for defining methods.
    And please use the highlight tags for better readability.
    im sorry am i should add import java.io.*; under package parameter? what the function of java.io.*;?

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    Default Re: '{' expected error please help

    Quote Originally Posted by erdy_rezki View Post
    im sorry am i should add import java.io.*; under package parameter? what the function of java.io.*;?
    You have it in the right place. java.io is not a function (method in java), it's a package. You can't import a method, you import packages (in the beginning of your code, before you declare your class). Here is java.io. If you are a begginner you should familiarize yourself with the Java API. And you should also google every question you have, you will find answers to almost everything.

  10. #9
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    Default Re: '{' expected error please help

    Quote Originally Posted by andreas90 View Post
    You have it in the right place. java.io is not a function (method in java), it's a package. You can't import a method, you import packages (in the beginning of your code, before you declare your class). Here is java.io. If you are a begginner you should familiarize yourself with the Java API. And you should also google every question you have, you will find answers to almost everything.
    okay thanks again for your help

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