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Program Mencari Nilai Java

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class NilaiUjian
{
public static void main(String[] ap) {
BufferedReader is = new BufferedReader(new InputStreamReader(System.in));

String line1 = null;
int val1 = 0;
try {
System.out.println("Silahkan Masukan 3 Nilai Ujian Anda !");
System.out.print("Nilai Ujian 1 = ");
line1 = is.readLine( );
val1 = Integer.parseInt(line1);
} catch (NumberFormatException ex) {
System.err.println("Not a valid number : " + line1);
} catch (IOException e) {
System.err.println("Unexpected IO ERROR: " + e);
}


String line2 = null;
int val2 = 0;
try {
System.out.print("Nilai Ujian 2 = ");
line2 = is.readLine( );
val2 = Integer.parseInt(line2);
} catch (NumberFormatException ex) {
System.err.println("Not a valid number : " + line2);
} catch (IOException e) {
System.err.println("Unexpected IO ERROR: " + e);
}

String line3 = null;
int val3 = 0;
try {
System.out.print("Nilai Ujian 3 = ");
line3 = is.readLine( );
val3 = Integer.parseInt(line1);
} catch (NumberFormatException ex) {
System.err.println("Not a valid number : " + line3);
} catch (IOException e) {
System.err.println("Unexpected IO ERROR: " + e);
}
double grade = 0;
grade = ((val1+val2+val3)/3);
System.out.println();
System.out.println("Anda mempunyai Grade = " + grade);

if( grade >= 90 ){
System.out.println( "Excellent!" );}
else if( (grade < 90) && (grade >= 80)){
System.out.println("Good job!" );}
else if( (grade < 80) && (grade >= 60)){
System.out.println("Study harder!" );}
else 
System.out.println("Sorry, you failed.");
}

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