Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question

Fix the Java program:

Make sure the program have the "Main" function.

Code:

class RemoveDuplicates
{
publicstaticvoid Main(String[] args)
{
int a[]={1,3,5,2,3,5,3,3,5,7,9,3};
System.out.print("Before Sorting:");
for (int i=0;i<a.length; i++ )
{
System.out.print(a[i]+"\t");
}
System.out.print ("\nAfter Sorting:");
//sorting the elements
for(int i=0;i<a.length;i++)
{
for(int j=i;j<a.length;j++)
{
if(a[i]>a[j])
{
int temp=a[i];
a[i]=a[j];
a[j]=temp;
}

}
}

//After sorting
for(int i=0;i<a.length;i++)
{
System.out.print(a[i]+"\t");
}
System.out.print("\nAfter removing duplicates:");
System.out.print("\n Here are the distinct numbers:");
int b=0;
a[b]=a[0];
for(int i=0;i<a.length;i++)
{
if (a[b]!=a[i])
{
b++;
a[b]=a[i];
}
}
for (int i=0;i<=b;i++ )
{
System.out.print(a[i]+"\t");
}
}
}
 
Output: 
class RemoveDuplicates
{
publicstaticvoid Main(String[] args)
{
int a[]={1,3,5,2,3,5,3,3,5,7,9,3};
System.out.print("Before Sorting:");
for (int i=0;i<a.length; i++ )
{
System.out.print(a[i]+"\t");
}
System.out.print ("\nAfter Sorting:");
//sorting the elements
for(int i=0;i<a.length;i++)
{
for(int j=i;j<a.length;j++)
{
if(a[i]>a[j])
{
int temp=a[i];
a[i]=a[j];
a[j]=temp;
}

}
}

//After sorting
for(int i=0;i<a.length;i++)
{
System.out.print(a[i]+"\t");
}
System.out.print("\nAfter removing duplicates:");
System.out.print("\n Here are the distinct numbers:");
int b=0;
a[b]=a[0];
for(int i=0;i<a.length;i++)
{
if (a[b]!=a[i])
{
b++;
a[b]=a[i];
}
}
for (int i=0;i<=b;i++ )
{
System.out.print(a[i]+"\t");
}
}
}
 
Output: 
 
```java
> java -classpath ./.:run_dir/junit-4.12.jar:target/dependency/* Main
usage: java Main 5 4 2 4 8
To remove duplicates from the numbers 5, 4, 2, 4 and 8
```

```java
> java Main 5 4 2 4 8
Here are the distinct numbers:
5, 4, 2, 8
```

```java
> java Main 1 3 5 2 3 5 3 5 3 7 9 3
Here are the distinct numbers:
1, 3, 5, 2, 7, 9
``` 

### Explanation

This text showcases a simple Java program designed to remove duplicate numbers from an input sequence and display only distinct numbers.

1. **Command Explanation:**
   - The `java -classpath` command sets the class path and executes the `Main` program. The class path includes necessary dependencies like `junit-4.12.jar`.
   - `java Main` is followed by a series of numbers as arguments. These numbers will be processed by the program to filter out duplicates.

2. **Output Explanation:**
   - When executed, the program prints out "Here are the distinct numbers:" followed by a comma-separated list of numbers with duplicates removed.

By running the `Main` program with different sets of numbers, the examples demonstrate how the program eliminates duplicate entries from a list, emphasizing the concept of distinct values in a data set.
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Transcribed Image Text:```java > java -classpath ./.:run_dir/junit-4.12.jar:target/dependency/* Main usage: java Main 5 4 2 4 8 To remove duplicates from the numbers 5, 4, 2, 4 and 8 ``` ```java > java Main 5 4 2 4 8 Here are the distinct numbers: 5, 4, 2, 8 ``` ```java > java Main 1 3 5 2 3 5 3 5 3 7 9 3 Here are the distinct numbers: 1, 3, 5, 2, 7, 9 ``` ### Explanation This text showcases a simple Java program designed to remove duplicate numbers from an input sequence and display only distinct numbers. 1. **Command Explanation:** - The `java -classpath` command sets the class path and executes the `Main` program. The class path includes necessary dependencies like `junit-4.12.jar`. - `java Main` is followed by a series of numbers as arguments. These numbers will be processed by the program to filter out duplicates. 2. **Output Explanation:** - When executed, the program prints out "Here are the distinct numbers:" followed by a comma-separated list of numbers with duplicates removed. By running the `Main` program with different sets of numbers, the examples demonstrate how the program eliminates duplicate entries from a list, emphasizing the concept of distinct values in a data set.
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