151009

//数组
int myarry[] = new int [5];

//初始化
int[] sh = {1,2,3};

//索引是从0开始

myarry[0] = 100;
myarry[2] = 200;
myarry[4] = 400;

//初始化数组

int my[] = new int[]{0,1,2,3,4};
for (int g = 0; g < myarry.length; g++)
{
System.out.println("myarry = " + myarry[g]);
}

char[] csz = new char[5];

csz[0] =  'g';

double[] dsz = {1,2,3};

long lsz[] = new long[]{1,3,5,2};

long l = lsz[2];

//操作数组
Arrays.sort(lsz);//排序

//遍历

int n = 0;
while(n < lsz.length)
{
System.out.println(" lsz{" + n + "] = " + lsz
);
n++;
}

//复制数组
long[] lsz2 = lsz;

long[] lsz3 = Arrays.copyOf(lsz,2);

long[] lsz4 = Arrays.copyOfRange(lsz, 1, 3);

//查询数组,返回索引值
System.out.println("'8的索引位置 ="+Arrays.binarySearch(lsz, 8)) ;

//填充
Arrays.fill(lsz2, 2);

Arrays.fill(lsz3, 1,3,8);

//foreach语句

for(double d : dsz)
{
System.out.println("d = " + d);
}

//二维数组
int[][] ewsz = new int[2][3];

ewsz[0] = new int[]{1,2,3};
ewsz[1] = new int[]{4,5,6};

System.out.println("ewsz = " + ewsz[1][2]);

System.out.println("ewsz = " + ewsz.length);

for(int[] ie : ewsz)
{
for(int f : ie)
{
System.out.print( f + " ");
}

System.out.println();
}

for(int m = 0;m < ewsz.length; m++)//ewsz.length  数组的长度，其实就是行数长度
{
for(int k = 0;k < ewsz[m].length; k++)//ewsz[m].length 数组里面的长度 相当于列数长度
{
System.out.print(ewsz[m][k]+" ");
}
System.out.println();
}
//冒泡排序

int[] sz = {23,12,56,97,19,30,7,21};

for(int i : sz)
{
System.out.print(i + ",");
}

System.out.println();

for (int j = 1; j < sz.length; j++)
{
for(int i = 0; i < sz.length - 1; i++)

//改变排序方式
{
if(sz[i] > sz[i + 1])
{
int t = sz[i + 1];

sz[i + 1] = sz[i];

sz[i] = t;
}
}
for(int i : sz)
{
System.out.print(i+ ",");
}
System.out.println();
}