[英]Printing a 2d array of coordinates in java
我正在尝试使用嵌套的 for 循环以及我在 MyPoint 类中创建的getX()
和getY()
方法打印我在 Lab12 类中创建的数组。 但是我的循环只是给了我参考。 我如何获得要打印的值
pt[0][0] = (0.5, 1.2)
pt[0][1] = (0.0, 3.14)
pt[0][2] = (15.0, 27.5)
pt[1][0] = (6.6, 7.7)
pt[1][1] = (1.2, 2.1)
pt[1][2] = (12.0, 127.0)
public class MyPoint {
private double x;
private double y;
public MyPoint(double x, double y) {
this.x = x;
this.y = y;
}
public double getX() {
return x;
}
public double getY() {
return y;
}
}
public class Lab12 {
public static void main(String[] args) {
// TODO Auto-generated method stub
MyPoint [][]pointMatrix = {
{new MyPoint(0.5,1.2), new MyPoint(0.0,3.14), new MyPoint(15.0,27.5)},
{new MyPoint(6.6,7.7), new MyPoint(1.2,2.1), new MyPoint(12.0,127.0)}
};
for (int i=0; i<pointMatrix.length; i++) {
for (int j=0; j<pointMatrix[i].length; j++){
System.out.print(pointMatrix[i][j] + " ");
}
System.out.println();
}
}
正如@Lashane 提到的,最好的选择是实现toString()
方法:
public class MyPoint {
// ...
@Override
public String toString() {
return "(" + x + ", " + y + ")";
}
}
在你的循环中:
System.out.println("pt[" + i + "][" + j + "] = " + pointMatrix[i][j]);
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