Question

请你发一个例子在DB上设置/写一个位吗？

用这个我写DB的整个字节（我想）

ClientPlc.ReadArea(S7.S7AreaDB, 200, 0, 1, Buffer);

非常感谢

Answer 1

 byte[] data = new byte[2];
 res = client.ReadArea(S7.S7AreaDB, 59001, 0, 2, data); //I want to read DB7.DBD0 (it is a real)

 if (res == 0) {

    retEmerg01 = S7.GetBitAt(data, 0, 0);
    retEmerg02 = S7.GetBitAt(data, 0, 1);
    retEmerg03 = S7.GetBitAt(data, 0, 2);
    retEmerg04 = S7.GetBitAt(data, 0, 3);
    retEmerg05 = S7.GetBitAt(data, 0, 4);
    retEmerg06 = S7.GetBitAt(data, 0, 5);
    retEmerg07 = S7.GetBitAt(data, 0, 6);
    retEmerg08 = S7.GetBitAt(data, 0, 7);
    retEmerg09 = S7.GetBitAt(data, 1, 0);
    retEmerg10 = S7.GetBitAt(data, 1, 1);
    retEmerg11 = S7.GetBitAt(data, 1, 2);
    retEmerg12 = S7.GetBitAt(data, 1, 3);
    retEmerg13 = S7.GetBitAt(data, 1, 4);

    }

您可以这样做。

Answer 2

对我来说，它是这样的：

import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

public class RemoveDuplicates {
public static void main(String[] args) {

    String string = "PayPalIndia";

    List<Character> strings = string.chars().mapToObj(c -> (char) c).collect(Collectors.toList());
    Set<Character> set = new HashSet<>();

    Iterator<Character> iterator = strings.iterator();
    Set<Character> invalid = new HashSet<>();
    while (iterator.hasNext()) {
        Character c = iterator.next();
        if (set.contains(c)) {
            iterator.remove();
            invalid.add(c);
        } else {
            set.add(c);
        }
    }
    System.out.println("Duplicate parents");
    invalid.forEach(System.out::print);
    System.out.println();
    strings.removeAll(invalid);

    System.out.println("=============");
    System.out.println("After removing Duplicates...");
    strings.forEach(System.out::print);
    System.out.println();
}

Moka7 - Java - 单位读 - 写

2 个答案: