Thread: '{' expected error please help

MathExploreToy1.txt

error java.jpg

error java1.jpg

error java2.jpg

error java3.jpg

error java4.jpg

what should i do to solve this error ?

Originally Posted by andreas90

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");

}

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

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.

okay thanks for your comments its really good for my learning

Originally Posted by andreas90

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.*;?

Originally Posted by erdy_rezki

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.

Originally Posted by andreas90

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