ArrayParameters.java （j基 p45）

//传递参数，和c中传地址有点像
public class ArrayParameters {
public static void changeOrNot (int i, double[] x) {
i =-1;
x[0] = -2.0;
double[] y = x;
y[1] = -3.0;
double[] z = {4.0, 4.0, 4.0};
x = z;
}
public static void main (String[] args) {
String s1 = "java";
String s2 = "java";
p(s1 ==s2);
int k = 0;
double[] A = {1.0, 2.0, 3.0};
changeOrNot(k, A);
p("k: " + k);
p("A[0] " + A[0]);
p("A[1] " + A[1]);
p("A[2] " + A[2]);
}
public static void p (Object o) {
System.out.println(o);
}
}
/*
true
k: 0
A[0] -2.0
A[1] -3.0
A[2] 3.0
*/