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SERBA SERBI CONTOH SOURCE CODE JAVA
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.*;
import java.lang.*;
import javax.swing.*;
import java.lang.String;
public class komen
{
public static void main (String args[]) throws IOException
{
BufferedReader dataIn = new BufferedReader(new InputStreamReader( System.in) );
char k;
String komen = ” “;
System.out.print(“Masukkan karakter = “);
k = (char) dataIn.read();
if (k == ‘d’)
{
//System.out.println(“Anda berhasil”);
komen = “anda berhasil”;
}
else
{
//System.out.println(“Anda belum berhasil”);
komen = “anda belum berhasil”;
}
System.out.println(komen);
}
}
import java.io.*;
public class nilai
{
public static void main(String[]arg)throws IOException
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
char lagi=’y’;
do
{
System.out.println(“Masukan nilai=”);
Integer n=Integer.parseInt(dataIn.readLine());
if(n>=90&&n<=100)
{
System.out.println(“Nilai anda A”)
}
if(n>=75&&n<=89)
{
System.out.println(“Nilai anda B”);
}
if(n>=55&&n<=74)
{
System.out.println(“Nilai anda C”);
}
if(n>=35&&n<=54)
{
System.out.println(“Nilai anda D”);
}
if(n>=0&&n<=34)
{
System.out.println(“Nilai anda E”);
}
System.out.println(“coba lagi?”);
lagi=(char)dataIn.read();
}
while(lagi==’y’);
}
}
import java.io.*;
public class BilanganPrima
{
public static void main(String[] args)
{
int upperLimit = 30;
int lowerLimit = 0;
int counter = 0;
System.out.print(“Bilangan prima yang ada di antara ” +
lowerLimit + ” – ” + upperLimit + ” : “);
//cari bilangan prima yang terletak di antara
//upperLimit dan lowerLimit
for(int i=lowerLimit;i<=upperLimit;i++)
{
int factorCounter = 0;
//hitung jumlah faktor dari bilangan ini
for(int j=1;j<=i;j++)
{
if(i%j==0)
{
factorCounter++;
}
}
//jika jumlah faktor=2 berarti ini adalah bilangan prima
if(factorCounter==2)
{
counter++;
System.out.print(i + ” “);
}
}
if(counter==0)
System.out.println(“Tidak ada !”);
}
}
import java.io.*;
public class deret3
{
public static void main(String[]arg)
{
int x,y,i,jml;
float tot;
x=1;
y=2;
tot=0;
jml=5;
for(i=1;i<jml;i++)
{
System.out.print(“”+x+”/”+y+”+”);
tot=x/y;
x=x+1;
y=y+1;
}
System.out.print(“=”+tot);
}
}
import java.io.*;
public class fibo
{
public static void main(String[]arg)throws IOException
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
int c,i,d;
System.out.println(“masukan bilangan pertama=”);
int a=Integer.parseInt(dataIn.readLine());
System.out.println(“masukan bilangan kedua=”);
int b=Integer.parseInt(dataIn.readLine());
System.out.println(“”);
System.out.println(a);
System.out.println(b);
for(i=1;i<=3;i++)
{
c=a+b;
System.out.println(c);
a=b;
b=c;
}
}
}
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.*;
import java.lang.*;
public class mtk
{
public static void main(String[] arg) throws IOException
{
BufferedReader dataIn = new BufferedReader(new InputStreamReader( System.in) );
double a,b;
double c,d,e,f,g,h;
float x,y,z;
System.out.println(“\n\n”);
System.out.println(“OPERASI MATEMATIKA \n”);
System.out.print(“Masukkan Nilai a = “);
a = Double.parseDouble(dataIn.readLine());
System.out.print(“Masukkan Nilai b = “);
b = Double.parseDouble(dataIn.readLine());
System.out.print(“Masukkan Nilai x = “);
x = Float.parseFloat(dataIn.readLine());
System.out.print(“Masukkan Nilai y = “);
y = Float.parseFloat(dataIn.readLine());
c = a – b;
d = a + b;
e = a * b;
f = a/b;
z = x/y;
System.out.println(“\n\n”);
System.out.println(“Hasil a – b = ” + c);
System.out.println(“Hasil a + b = ” + d);
System.out.println(“Hasil a * b = ” + e);
System.out.println(“Hasil a / b = ” + f);
System.out.println(“Hasil x / y = ” + z);
}
}
import java.io.*;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.*;
public class nilai_max
{
public static void main (String[] args) throws IOException
{
BufferedReader DataIn = new BufferedReader (new InputStreamReader(System.in));
int i,a;
int[] x = new int[5];
System.out.println (“Silahkan Input Data = “);
for (i=0; i<5; i++)
{
x[i]=Integer.parseInt(DataIn.readLine());
}
System.out.println(“\n”);
int max = x[0];
for (i=0; i<5; i++)
{
if (max < x[i])
{
max = x[i];
}
}
System.out.println(max);
}
}
import java.io.*;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.*;
public class urutan_kecil
{
public static void main (String[] args) throws IOException
{
BufferedReader DataIn = new BufferedReader (new InputStreamReader(System.in));
int i, n;
int temp;
int[] x = new int[5];
System.out.println (“Silahkan Input Data = “);
for (i=0; i<=4; i++)
{
x[i]=Integer.parseInt(DataIn.readLine());
}
System.out.println(“\n\n”);
for (n=0; n<=4; n++)
{
for (i=0; i<=4; i++)
{
if (x[n] < x[i])
{
temp = x[i];
x[i] = x[n];
x[n] = temp;
}
}
}
for (i=0; i<=4; i++)
{
System.out.println (x[i]);
}
}
}
import java.io.*;
public class genap
{
public static void main(String[]arg)throws IOException
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
int i,g,j,pilihan;
char lagi=’y’;
do
{
System.out.println(“1.genap”);
System.out.println(“2.ganjil”);
System.out.println(“3.keluar”);
System.out.println(“masukan pilihan anda=”);
pilihan=Integer.parseInt(dataIn.readLine());
if(pilihan==1)
{
System.out.println(“berapa kali?”);
int a=Integer.parseInt(dataIn.readLine());
System.out.println(“genap=”);
for(i=1;i<=a;i++)
{
g=i*2;
System.out.println(g);
}
}
else if(pilihan==2)
{
System.out.println(“berapa kali?”);
int b=Integer.parseInt(dataIn.readLine());
System.out.println(“ganjil=”);
for(i=1;i<=b;i++)
{
j=i*2-1;
System.out.println(j);
}
}
else if(pilihan==3)
{
System.exit(0);
}
else
{
System.out.println(“pilihan anda salah”);
}
System.out.println(“lagi?”);
lagi=(char)dataIn.read();
}
while(lagi==’y’);
}
}
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.*;
import java.lang.*;
import javax.swing.*;
import java.lang.String;
public class mtktugas
{
public static void main (String args[]) throws IOException
{
BufferedReader dataIn = new BufferedReader(new InputStreamReader( System.in) );
Double a,b;
Double c,d,e,f;
System.out.print(“Masukkan Nilai a = “);
a = Double.parseDouble(dataIn.readLine());
System.out.print(“Masukkan Nilai b = “);
b = Double.parseDouble(dataIn.readLine());
String pilihan=JOptionPane.showInputDialog (“Operator Matematika :\n1. Penjumlahan\n2.
Pengurangan\n3. Perkalian\n4. Pembagian\npress other 1-4 to exit”);
int pilih=Integer.parseInt (pilihan);
switch (pilih)
{
case 1 :
c = a + b;
System.out.println(“Hasil a + b = ” + c); break;
case 2 :
d = a – b;
System.out.println(“Hasil a – b = ” + d);
break;
case 3 :
e = a * b;
System.out.println(“Hasil a * b = ” + e);
break;
case 4 :
f = a/b;
System.out.println(“Hasil a / b = ” + f);
break;
default : System.out.println(“Maaf, menu tidak tersedia”);
break;
}
System.exit(0);
}
}
import java.io.*;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.*;
public class urut_min
{
public static void main (String[] args) throws IOException
{
BufferedReader DataIn = new BufferedReader (new InputStreamReader(System.in));
int i,a;
int[] x = new int[5];
System.out.println (“Silahkan Input Data = “);
for (i=0; i<5; i++)
{
x[i]=Integer.parseInt(DataIn.readLine());
}
System.out.println(“\n”);
int max = x[0];
for (i=0; i<5; i++)
{
if (max > x[i])
{
max = x[i];
}
}
System.out.println(max);
}
}
import java.io.*;
public class deret2
{
public static void main(String[]arg)throws IOException
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
int i,c;
System.out.println(“diulang berapa kali?”);
int d=Integer.parseInt(dataIn.readLine());
System.out.println(“”);
for(i=1;i<d;i++)
{
System.out.print(i+”/”+(i+1)+” + “);
}
System.out.print(d+”/”+(i+1));
}
}
import java.io.*;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.*;
public class urut_besar
{
public static void main (String[] args) throws IOException
{
BufferedReader DataIn = new BufferedReader (new InputStreamReader(System.in));
int i, n;
int temp;
int[] x = new int[5];
System.out.println (“Silahkan Input Data = “);
for (i=0; i<=4; i++)
{
x[i]=Integer.parseInt(DataIn.readLine());
}
System.out.println(“\n\n”);
for (n=0; n<=4; n++)
{
for (i=0; i<=4; i++)
{
if (x[n] > x[i])
{
temp = x[i];
x[i] = x[n];
x[n] = temp;
} }
}
for (i=0; i<=4; i++)
{
System.out.println (x[i]);
}
}
}
import java.io.*;
public class HitungLuas
{
public static void main(String[] args)
{
//data segitiga
int panjangSegitiga = 5;
int tinggiSegiTiga = 9;
//data lingkaran
int jari2Lingkaran = 15;
//data bujursangkar
int panjangSisi = 13;
//data empat persegi panjang
int panjangPersegi = 35;
int lebarPersegi = 45;
//hitung luas
double luas;
//luas segitiga
luas = ((double)(panjangSegitiga*tinggiSegiTiga))/2;
System.out.println(“Luas Segitiga : ” + luas);
//luas lingkaran
luas = 3.14*jari2Lingkaran*jari2Lingkaran;
System.out.println(“Luas Lingkaran : ” + luas);
//luas bujursangkar
luas = panjangSisi*panjangSisi;
System.out.println(“Luas Bujursangkar : ” + luas);
//luas persegi panjang
luas = panjangPersegi*lebarPersegi;
System.out.println(“Luas Persegi Panjang : ” + luas);
}
}
package java2s;
import java.io.*;
class pswd
{
public static void main(String[] args) throws IOException
{
String user;
String pswd;
BufferedReader datain = new BufferedReader(new InputStreamReader(System.in));
//System.out.print(‘\u000c’);
final int NUM_LINES = 100; // Just to be safe
for (int i = 0; i < NUM_LINES; i++) System.out.println();
System.out.println(“user Anda : “);
user = datain.readLine();
System.out.println(“pswd Anda : “);
pswd = datain.readLine();
if (user.equals(“ti-05”) && pswd.equals(“123”))
{
System.out.println(“anda berhak untuk login”);
}
else
{
System.out.println(“maaf anda tidak bisa login”);
}
System.out.println(“Nama Anda yaitu : “+user);
}
}
import java.io.*;
public class konversi
{
public static void main(String[]arg)throws IOException
{
BufferedReader dataIn=new BufferedReader(new InputStreamReader(System.in));
float c,d,e,f;
System.out.println(“Menu Pilihan”);
System.out.println(“1.Penjumlahan”);
System.out.println(“2.Pengurangan”);
System.out.println(“3.Perkalian”);
System.out.println(“4.Pembagian”);
System.out.println(“masukan pilihan anda:”);
int pilihan=Integer.parseInt(dataIn.readLine());
if(pilihan==1)
{
System.out.println(“nilai a:”);
Float a=Float.parseFloat(dataIn.readLine());
System.out.println(“nilai b:”);
Float b=Float.parseFloat(dataIn.readLine());
c=a+b;
System.out.println(“hasil”+a+”+”+b+”=”+c);
}
if(pilihan==2)
{
System.out.println(“nilai a:”);
Float a=Float.parseFloat(dataIn.readLine());
System.out.println(“nilai b:”);
Float b=Float.parseFloat(dataIn.readLine());
d=a-b;
System.out.println(“hasil a-b=”+d);
}
if(pilihan==3)
{
System.out.println(“nilai a:”);
Float a=Float.parseFloat(dataIn.readLine());
System.out.println(“nilai b:”);
Float b=Float.parseFloat(dataIn.readLine());
e=a*b;
System.out.println(“hasil a*b=”+e);
}
if(pilihan==4)
{
System.out.println(“nilai a:”);
Float a=Float.parseFloat(dataIn.readLine());
System.out.println(“nilai b:”);
Float b=Float.parseFloat(dataIn.readLine());
f=a/b;
System.out.println(“hasil a/b=”+f);
}
}
}
import java.io.*;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.*;
public class pencarian
{
public static void main (String[] args) throws IOException
{
BufferedReader DataIn = new BufferedReader (new InputStreamReader(System.in));
int i;
int a = 0;
int cari;
int[] x = new int[5];
System.out.println (“Silahkan Input Data = “);
for (i=0; i<5; i++)
{
x[i]=Integer.parseInt(DataIn.readLine());
}
System.out.println(“\n\n”);
System.out.print (“Angka berapa yang anda cari = “);
cari = Integer.parseInt(DataIn.readLine());
for (i=0; i<5; i++)
{
if (x[i] == cari)
{
a = a +1;
}
}
System.out.println(“\n\n”);
if (a == 0)
{
System.out.println (“Angka tidak ditemukan”);
}
else
System.out.println (“Angka ditemukan sebanyak ” + a);
}
}
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.*;
import java.lang.*;
import javax.swing.*;
import java.lang.String;
public class indek
{
public static void main (String args[]) throws IOException
{
BufferedReader dataIn = new BufferedReader(new InputStreamReader( System.in) );
String grade;
String komen;
String nama, nim, kelas, semester;
Double uts, uas, tugas, absen, n;
System.out.print(“Nama anda = “);
nama = dataIn.readLine();
System.out.print(“NIM anda = “);
nim = dataIn.readLine();
System.out.print(“Kelas anda = “);
kelas = dataIn.readLine();
System.out.print(“Semester = “);
semester = dataIn.readLine();
System.out.print(“\n\n”);
System.out.print(“Nilai Komulatif (Indeks)\n”);
System.out.print(“Nilai UTS = “);
uts = Double.parseDouble(dataIn.readLine());
System.out.print(“Nilai UAS = “);
uas = Double.parseDouble(dataIn.readLine());
System.out.print(“Nilai TUGAS = “);
tugas = Double.parseDouble(dataIn.readLine());
System.out.print(“Nilai ABSENSI = “);
absen = Double.parseDouble(dataIn.readLine());
n = (uts + uas + tugas + absen) / 4;
if (n >=90 && n <=100)
{
grade = “A”;
komen = “Pertahankan prestasimu”;
}
else if (n >=75 && n <90)
{
grade = “B”;
komen = “Tingkatkan prestasimu lagi”;
}
else if (n >=55 && n <75)
{
grade = “C”;
komen = “Berusahalah untuk memperbaiki prestasimu lagi”;
}
else if (n >=35 && n <55)
{
grade = “D”;
komen = “Berusahalah lebih giat lagi tuk memperbaiki nilaimu”;
}
else
{
grade = “E”;
komen = “Ayo…semangat lagi dong”;
}
System.out.println(“Nilai anda = ” + n);
System.out.println(“Grade anda = ” + grade);
System.out.println(komen);
System.exit(0);
}
}
Fat's Albojongi 