Pemograman, Pengenalan Sintaks dan Tools

1.  Program Hello.java

package modul1.latihan;
public class Hello {
public static void main(String[] args) {
System.out.println("hello again");
}
}

2.  Program Numerik.java
package modul1.latihan;
import java.util.Scanner;
public class Numerik {
public static void main(String[] args) {
float f;
double d;
long l;
int i;
Scanner sc = new Scanner(System.in);
System.out.print("Bilangan integer: ");
i = sc.nextInt();
System.out.println("i: " + i);
System.out.print("Bilangan long integer (x>34000): ");
l = sc.nextLong();
System.out.println("l: " + l);
System.out.print("Bilangan float/desimal: ");
f = sc.nextFloat();
System.out.println("f: " + f);
System.out.print("Bilangan double: ");
d = sc.nextDouble();
System.out.println("d: " + d);
}
}


3.  Program Character.java
package modul1.latihan;
import java.util.Scanner;
public class Character {
public static void main(String[] args) {
char Ch;
String S;
Scanner sc = new Scanner(System.in);
System.out.print("Char: ");
S = sc.nextLine();
Ch = S.charAt(0);
System.out.println("Ch: " + Ch);
}
}
4.  Program Boolean.java
package modul1.latihan;
import java.util.Scanner;
public class Boolean {
public static void main(String[] args) {
float B1, B2;
boolean Sama;
Scanner sc = new Scanner(System.in);
System.out.print("Bil1 : ");
B1 = sc.nextFloat();
System.out.print("Bil2 : ");
B2 = sc.nextFloat();
Sama = (B1 != B2);
System.out.println("Bil1 != Bil2 adalah : " + Sama);
Sama = (B1 == B2);
System.out.println("Bil1 == Bil2 adalah : " + Sama);
Sama = (B1 < B2);
System.out.println("Bil1 < Bil2 adalah : " + Sama);
Sama = (B1 > B2);
System.out.println("Bil1 > Bil2 adalah : " + Sama);
}
}


5.  Program HitungLSE.java

package modul1.latihan;
import java.util.Scanner;
public class HitungLSE {
public static void main(String[] args) {
/*
* Membaca panjang dan lebar segiempat menghitung
luasnya,lalu mencetak
* luas tesrebut ke layar
*/
float panjang; /* panjang (length) */
float lebar; /* lebar (width) cm */
float luas; /* luas (area) */
Scanner sc = new Scanner(System.in);
System.out.println("Berapa panjang segiempat? ");
panjang = sc.nextInt();
System.out.println("Berapa lebar segiempat? ");
lebar = sc.nextInt();
luas = panjang * lebar;
System.out.println("Luas segiempat = " + luas);
}
}