1 số bài Java Lab đơn giản

•  package javalab;
  
  
  public class CheckNumber {
  public static void main(String agrs[]){
  int x=10;
  if (x%2==0)
      System.out.println("x la so chan");
  else
      System.out.println("x la so le");
  }
  }

1.  ForDemo.java

•  package javalab;
  
  public class ForDemo {
  public static void main(String agrs[]){
  int i=1,sum=0;
  for(i=1;i<=10;i+=2)
  sum+=i;
  System.out.println("Sum of first five odd numbers is:"+sum);
  }
  }

1.  Minmang.java

•  package javalab;
  
  /**
   *Cho 1 dãy số tự nhiên,tìm và in ra 1 giá trị min của dãy này và tất cả các chỉ
   * số ứng với giá trị min này
   */
  public class Minmang {
  public static void main(String agrs[]){
  int []a={3,1,7,0,10};
  int N=5,k,min;
  min=a[0];
  for(k=0;k<N;k++){
  if (min>a[k])
      min=a[k];
  System.out.println("Gia tri nho nhat cua day la:"+min);
  System.out.print("Vi tri cua so co gia tri min la:");
  for(k=0;k<N;k++)
      if(min==a[k])
          System.out.print(k+" ");
  }
  }
  }

1.  RelationalOp

• package javalab;
  
  public class RelationalOp {
  public static void main(String agrs[]){
  float a=10.0f;
  double b=10.0;
  if(a==b)
      System.out.println("a and b are equal");
  else
      System.out.println("a and b are not equal");
  }
  }

1.  SXGD

•  package javalab;
  
  
  public class SXGD {
  public static void main(String agrs[]){
      int []a={3,1,7,0,10};
      int N=5,k,j,temp;
      for(k=0;k<N-1;k++){
          for(j=k+1;j<N;j++){
              if(a[k]<a[j]){
                  temp=a[j];
                  a[j]=a[k];
                  a[k]=temp;
              }
              }
      }
      for(k=0;k<N;k++){
      System.out.println(a[k]+" ");
      }
  }
  }
  

1.  SoNguyento

• package javalab;
  
  
  public class SoNguyento {
      public static void main(String agrs[]){
      int k=0,n,dem,j=0;
      while(j<10){
      k++;
      dem=0;
      for(n=2;n<=k;n++){
          if(k%n==0){
          dem++;
          }
      }
      if(dem==1){
      System.out.println("so nguyen to thu "+(j+1)+":"+k+" ");
      j++;
      }
      }
      }
  
  }

1.  Solechiahet3

•  package javalab;
  
  public class Solechiahet3 {
  public static void main(String agrs[]){
  int i;
  for(i=1;i<100;i++){
  if ((i%3==0) && (i%7==0))
      System.out.print(i+" ");
  }
  }
  }

1.  SwitchDemo

•  package javalab;
  
  
  public class SwitchDemo {
  public static void main(String agrs[]){
  int day=6;
  switch(day){
      case 0:System.out.println("Sunday");
              break;
      case 1:System.out.println("Monday");
              break;
      case 2:System.out.println("Tuesday");
              break;
      case 3:System.out.println("Webnesday");
              break;
      case 4:System.out.println("Thursday");
              break;
      case 5:System.out.println("Friday");
              break;
      case 6:System.out.println("Satuday");
              break;
         default:System.out.println("Invalid day of week");
  }
  }
  }

1.  Temp

•  package javalab;
  
  
  public class Temp {
  static int x=10;
  public static void show(){
  System.out.println(x);
  }
  public static void main(String args[]){
  Temp t=new Temp();
  t.show();
  Temp t1=new Temp();
  t1.x=20;
  t1.show();
  }
  }

1.  USNT

•  package javalab;
  
  public class USNT {
  public static void main(String agrs[]){
  int k,n,dem,N=1027;
  for(k=1;k<=N;k++){
  dem=0;
  for(n=2;n<=k;n++){
  if(k%n==0){
  dem++;
  }
  }
  if(dem==1&N%k==0){
  System.out.println(k+"");
  }
  }
  }
  }

1.  WhileDemo

•  package javalab;
  
  public class WhileDemo {
  public static void main(String agrs[]){
      int a=5,fact=1;
      while(a>=1){
      fact*=a;
      a--;
      }
      System.out.println("The Factorial of 5 is:"+fact);
  }
  
  }