java 如何从另一个类调用void方法
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How to call a void method from another class
提问by Thanospan
I would like to call the public void display() from another class but i don't know how please help me this my program:
我想从另一个班级调用 public void display() 但我不知道如何请帮我这个我的程序：
public class SignalMap
{
private boolean[][] signal;
private double threshold;
private Network net;
private int size;
public SignalMap(Network net, double threshold, int size)
{
this.net = net;
this.threshold = threshold;
signal = new boolean[size][size];
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if(net.getSignal(i, j) >= threshold)
{
signal[i][j] = false;
}
else
{
signal[i][j] = true;
}
}
}
}
public void display()
{
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if (signal[i][j].equals(true))
{
System.out.printf("%5d ", signal[i][j]);
}
}
System.out.println();
}
}
public double poorSignal()
{
int x = 0;
for(int i = 0; i < size; i++)
{
for(int j = 0; j < size; j++)
{
if (signal[i][j] == true)
{
x = x + 1;
}
}
}
return 1/(size/x);
}
}
Please help tell me if I am doing something wrong.
This is the question i have to answer : Write a method display in the SignalMapclass which prints the array showing those areas which have poor signal (for example, display an X if the signal is poor).
如果我做错了什么，请帮助告诉我。这是我必须回答的问题：在SignalMap类中编写一个方法 display打印显示信号较差的区域的数组（例如，如果信号较差则显示 X）。
回答by SMA
Just create instance of SignalMap and call display.
只需创建 SignalMap 的实例并调用显示。
public class MainClass {
public static void main(String args[]) {
SignalMap signalMap = new SignalMap(..................);
signalMap.display();
}
}
