# 在 Java 中计算欧几里得距离

## 在 Java 中计算欧几里得距离

``````import java.lang.Math.*;

public class DistPoint {
public static void main(String arg[]) {
int q1, q2, p1, p2;
double distance;
q1 = 2;
p1 = 3;
q2 = 4;
p2 = 5;
distance = Math.sqrt((q2 - q1) * (q2 - q1) + (p2 - p1) * (p2 - p1));
System.out.println("distance between two points:"
+ "(" + q1 + "," + p1 + "),"
+ "(" + q2 + "," + p2 + ")===>" + distance);
}
}
``````

``````import java.util.Scanner;

public class Distance {
public static void main(String arg[]) {
int q1, q2, p1, p2;
double distance;
Scanner newnum = new Scanner(System.in);

System.out.println("enter q1 point");
q1 = newnum.nextInt();

System.out.println("enter p1 point");
p1 = newnum.nextInt();

System.out.println("enter q2 point");
q2 = newnum.nextInt();

System.out.println("enter p2 point");
p2 = newnum.nextInt();

distance = Math.sqrt((q2 - q1) * (q2 - q1) + (p2 - p1) * (p2 - p1));

System.out.println("distance between two points:"
+ "(" + q1 + "," + p1 + "),"
+ "(" + q2 + "," + p2 + ")===>" + distance);
}
}
``````

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