Java vs. C#

Loop Constructs

Java
 
while
do-while
for
 


while statement
public static void main(String[] args) {
    int i = 0;    
    while (i < args.length) { 
        System.out.println(args[i]);
        i++;   
    }
}


do statement
static void main() { 
    int i;    
    do { 
        i++; 
    } while (i != 5);
}


for statement
static void main(String[] args) {    
    for (int i = 0; i < args.length; i++)  
        System.out.println(args[i]);
}


Java has for each statement since 1.5
public static void main(String[] args) {
    for (String arg : args)
       System.out.println(arg);
}


break statement
public static void main(String[] args) {    
    int i = 0;    
    while (true) {  
        if (i == args.length) 
            break;        
        System.out.println(args[i++]);    
    }
}


continue statement
public static void main(String[] args) {    
    int i = 0;    
    while (true) { 
        System.out.println(args[i++]);       
        if (i < args.length)  
            continue;       
        break;    
    }
}


class Test
{
    public static void main(String[] args) {
        double[][] values = {{1.2, 2.3, 3.4, 4.5},
                            {5.6, 6.7, 7.8, 8.9} };
        for(int i = 0; i < values.length; i++)
            for(int j = 0; j < values[0].length; j++)
               System.out.print(values[i][j]+" ");
    }
}
print: 1.2 2.3 3.4 4.5 5.6 6.7 7.8 8.9


class Test
{
    public static void main(String[] args) {
        String[][] table = {{"red", "blue", "green"},
                    {"Monday", "Wednesday", "Friday"} };
     done:    
         for(int i = 0; i < args.length; i++) {
            String str = args[i];
            int row, colm;
            for (row = 0; row <= 1; ++row) {
                for (colm = 0; colm <= 2; ++colm) {
                    if (str.equals(table[row][colm])) {
                       System.out.println("Found "+str+
                             " at ["+row+"]["+colm+"]");
                       break done;//java goto out of date
                    }
                }
            }
            System.out.println(str +" not found");     
        }
    }
}
>java Test green
Found green at [0][2]
>java Test Sunday
Sunday not found

C#
 
while
do-while
for
foreach 


while statement
static void Main(string[] args) {
    int i = 0;    
    while (i < args.Length) { 
        Console.WriteLine(args[i]);
        i++;    
    }
}


do statement
static void Main() {    
    int i;    
    do { 
        i++; 
    }while (i != 5);
}


for statement
static void Main(string[] args) {  
    for (int i = 0; i < args.Length; i++) 
        Console.WriteLine(args[i]);
}


foreach statement//short hand for for statement
static void Main(string[] args) {    
    foreach (string s in args)        
        Console.WriteLine(s);
}


break statement
static void Main(string[] args) {    
    int i = 0;    
    while (true) {   
       if (i == args.Length)  
           break;       
       Console.WriteLine(args[i++]);
    }
}


continue statement
static void Main(string[] args) {    
    int i = 0;    
    while (true) {       
        Console.WriteLine(args[i++]);     
        if (i < args.Length)    
            continue;      
        break;    
    }
}


class Test
{
    static void Main() {
        double[,] values = {    {1.2, 2.3, 3.4, 4.5},
                                {5.6, 6.7, 7.8, 8.9} };
        foreach (double elementValue in values)
            Console.Write("{0} ", elementValue);
        Console.WriteLine();
    }
}
print: 1.2 2.3 3.4 4.5 5.6 6.7 7.8 8.9


class Test
{
    static void Main(string[] args) {
        string[,] table = {{"red", "blue", "green"},
                           {"Monday", "Wednesday", "Friday"} };
        foreach (string str in args) {
            int row, colm;
            for (row = 0; row <= 1; ++row) {
                for (colm = 0; colm <= 2; ++colm) {
                    if (str == table[row,colm]) {
                         goto done;
                    }
                }
            }
            Console.WriteLine("{0} not found", str);
            continue;
        done:
            Console.WriteLine("Found {0} at [{1}][{2}]", 
                              str, row, colm);
        }
    }
}
>Test green
Found green at [0][2]
>Test Sunday
Sunday not found