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Copy pathString_22.java
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128 lines (113 loc) · 2.98 KB
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package HuaweiCoding;
import java.util.Scanner;
public class String_22 {
public static long ipToInteger(String inputStr) {
long results=0;
String[] fields = inputStr.split("\\.");
StringBuilder sb=new StringBuilder();
int parts=0;
for(int i=0;i<fields.length;i++) {
String resultStr = converToBinary(fields[i]);
parts++;
if(parts!=4) {
sb.append(resultStr).append(".");
}else {
sb.append(resultStr);
}
}
results = getIntegerResult(sb.toString());
return results;
}
public static String intValueToIp(long value) {
StringBuilder sb=new StringBuilder();
int counts=0;
while(value!=0) {
int result=(int) (value%2);
if(result==0) {
sb.append("0");
counts++;
if(counts%8==0) {
sb.append(".");
}
}else if(result==1) {
sb.append("1");
counts++;
if(counts%8==0) {
sb.append(".");
}
}
value=value/2;
}
String secondStr = sb.reverse().toString();
String[] fields = secondStr.split("\\.");
int size=8-fields[0].length();
StringBuilder firstStr=new StringBuilder();
for(int i=0;i<size;i++) {
firstStr.append("0");
}
String[] needHandle = firstStr.append(secondStr).reverse().toString().split("\\.");
StringBuilder afterHandle=new StringBuilder();
int handleCounts=0;
int parts=0;
for(int i=needHandle.length-1;i>=0;i--) {
char[] charArray = needHandle[i].toCharArray();
int values=0;
for(int j=0;j<charArray.length;j++) {
if(charArray[j]=='1') {
values+=Math.pow(2, handleCounts);
}
handleCounts++;
}
if(parts!=3) {
afterHandle.append(values).append(".");
}else {
afterHandle.append(values);
}
parts++;
handleCounts=0;
}
return afterHandle.toString();
}
public static String converToBinary(String inputStr) {
int parseInt = Integer.parseInt(inputStr);
StringBuilder temp=new StringBuilder();
while(parseInt!=0) {
temp.append(parseInt%2);
parseInt=parseInt/2;
}
int size=temp.toString().length();
if(size<8){
int counts=8-size;
for(int i=0;i<counts;i++) {
temp.append("0");
}
}
return temp.reverse().toString();
}
public static long getIntegerResult(String inputStr) {
long result=0;
String[] inputArray = inputStr.split("\\.");
StringBuilder needCal=new StringBuilder();
for(int i=0;i<inputArray.length;i++) {
needCal.append(inputArray[i]);
}
String resultStrCal = needCal.toString();
int counts=0;
for(int i=resultStrCal.length()-1;i>=0;i--) {
if(resultStrCal.charAt(i)=='1') {
result+=Math.pow(2, counts);
}
counts++;
}
return result;
}
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
while(sc.hasNext()) {
String inputStr = sc.nextLine();
String inputValue = sc.nextLine();
System.out.println(ipToInteger(inputStr));
System.out.println(intValueToIp(Long.parseLong(inputValue)));
}
}
}