(1).创建数组
double[] myList = new double[size]; //推荐创建方式 double myList[] = new double[size]; //没有灵魂的写法,非常不推荐
(2).创建数组并赋值
// 定义数组
double[] myList = new double[3];
myList[0] = 1.5;
myList[1] = 2.5;
myList[2] = 3.5;
// 计算所有元素和
double total = 0;
for (int i = 0; i < 3; i++) {
total += myList[i];
}
System.out.println(total);(3).java数组元素个数
array.length;
(4).java foreach 循环数组
// 定义数组
double[] myList = new double[3];
myList[0] = 1.5;
myList[1] = 2.5;
myList[2] = 3.5;
// 循环数组
for (double value : myList) {
System.out.println(value);
}(5).java 数组排序
// 定义数组
double[] myList = new double[3];
myList[0] = 1.5;
myList[1] = 2.5;
myList[2] = 0.5;
// 数组排序
Arrays.sort(myList);
// 循环数组
for (double value : myList) {
System.out.println(value);
} 
