File size: 712 Bytes
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public class Dutch_National_Flag {
public static void DNF(String A[]) {
int n=A.length;
int low=0,high=n-1,mid=0;
String temp;
while(mid<=high) {
switch(A[mid]) {
case "RED":
temp=A[low]; A[low]=A[mid]; A[mid]=temp;
low++;mid++;
break;
case "BLUE":
mid++;
break;
case "GREEN":
temp=A[mid]; A[mid]=A[high]; A[high]=temp;
high--;
break;
}
}
}
public static void Display(String A[]) {
for(int i=0;i<A.length;i++) {
System.out.print(A[i]+" ");
}
System.out.println();
}
public static void main(String[] args) {
String A[]= {"RED","BLUE","BLUE","RED","GREEN","GREEN","RED","RED","BLUE","GREEN"};
Display(A);
DNF(A);
Display(A);
}
}
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