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BitOperation.java
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69 lines (53 loc) · 1.93 KB
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public class BitOperation {
public static int get(int num, int i) {
int bitmask = 1 << i;
return num & bitmask;
}
public static int set(int num, int i) {
int bitmask = 1 << i;
return num | bitmask;
}
public static int clear(int num, int i) {
int bitmask = -1 << i;
return num & bitmask;
}
// Function to clear last i bits
public static int clearlastibit(int num, int i) {
int bitmask = -1 << i;
return num & bitmask;
}
// Function to clear the range of bits
public static int clearrange(int num, int i, int j) {
int a = -1 << (j + 1);
int b = (1 << i) - 1;
int bitmask = a | b;
return num & bitmask;
}
public static int update(int num, int i, int bit) {
// if(bit == 0){
// return set(num, i);
// }
// else{
// return clear(num, i);
// }
int n = clear(num, i);
int bitmask = bit << i;
return num | bitmask;
}
public static void main(String[] args) {
System.out.println(Integer.toBinaryString(14));
System.out.println(Integer.toBinaryString(get(14, 2)));
System.out.println("----------------------------");
System.out.println(Integer.toBinaryString(144));
System.out.println(Integer.toBinaryString(set(144, 2)));
System.out.println("----------------------------");
System.out.println(Integer.toBinaryString(144));
System.out.println(Integer.toBinaryString(clear(144, 5)));
System.out.println("----------------------------");
System.out.println(Integer.toBinaryString(144));
System.out.println(Integer.toBinaryString(clearlastibit(144, 5)));
System.out.println("----------------------------");
System.out.println(Integer.toBinaryString(144));
System.out.println(Integer.toBinaryString(clearrange(144, 2, 5 )));
}
}