我有一个问题:我无法检查两个阵列A和B中的元素是否相同...为什么这不起作用? 问题在于我的程序的这一部分,并且在if(A.get(j)== B.get(i))中,有一些我不知道的数组。
for(int i=0; i<n; i++){
if(B.get(i) != A.get(i)){
for(int j=0; j<n; j++){
if(A.get(j)==B.get(i)){
Collections.swap(B, j, i);
System.out.println("Swapping "+i+" with "+j+" : "+B);
count++;
}
}
}
}
洞程序是...... import java.util.ArrayList; import java.util.Collections; import java.util.Scanner;
public class Opgave4Uge6 {
private static Scanner s;
public static void main(String arg[]){
int n = s.nextInt();
long time = System.currentTimeMillis();
ArrayList<Integer> A = new ArrayList<>();
for(int a=0; a<n ;a++){
A.add(new Integer(a));
}
System.out.println("The solution");
System.out.println(A);
ArrayList<Integer> B = new ArrayList<>();
for(int b=0; b<n ;b++){
B.add(new Integer(b));
}
Collections.shuffle(B);
System.out.println("The random list");
System.out.println(B);
int count = 0;
for(int i=0; i<n; i++){
if(B.get(i) != A.get(i)){
for(int j=0; j<n; j++){
if(A.get(j)==B.get(i)){
Collections.swap(B, j, i);
System.out.println("Swapping "+i+" with "+j+" : "+B);
count++;
}
}
}
}
System.out.println(B+" Solved!");
System.out.println("Number of moves "+count);
int k = n-count;
System.out.println("Number of cycles "+k);
long newtime = System.currentTimeMillis()-time;
System.out.println("Time "+newtime+" ms");
}
}
BTW:我正在使用Netbeans。
答案 0 :(得分:2)
它不是关于arrays.use .equals()方法
for(int i=0; i<n; i++){
if(!B.get(i).equals(A.get(i))){
for(int j=0; j<n; j++){
if(A.get(j).equals(B.get(i))){
Collections.swap(B, j, i);
System.out.println("Swapping "+i+" with "+j+" : "+B);
count++;
}
}
}
}