Android字符串数组操作

在Android开发中，字符串数组操作是一个常见的任务。以下是一些常见的字符串数组操作，以及如何使用Android中的Java语言来实现它们。

创建字符串数组

String[] stringArray = new String[5];

初始化字符串数组

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};

访问字符串数组中的元素

String firstElement = stringArray[0];

修改字符串数组中的元素

stringArray[0] = "new value";

遍历字符串数组

for (int i = 0; i< stringArray.length; i++) {
    System.out.println(stringArray[i]);
}

将字符串数组转换为逗号分隔的字符串

String joinedString = TextUtils.join(", ", stringArray);

将逗号分隔的字符串转换为字符串数组

String[] stringArray = joinedString.split(", ");

将字符串数组排序

Arrays.sort(stringArray);

搜索字符串数组中的元素

int index = Arrays.binarySearch(stringArray, "cherry");

添加元素到字符串数组

List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
stringList.add("new element");
stringArray = stringList.toArray(new String[0]);

删除元素从字符串数组

List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
stringList.remove("cherry");
stringArray = stringList.toArray(new String[0]);

检查字符串数组是否包含某个元素

boolean containsElement = Arrays.asList(stringArray).contains("cherry");

获取字符串数组的长度

int length = stringArray.length;

复制字符串数组

String[] copiedArray = Arrays.copyOf(stringArray, stringArray.length);

合并两个字符串数组

String[] array1 = {"apple", "banana"};
String[] array2 = {"cherry", "date"};
String[] mergedArray = new String[array1.length + array2.length];
System.arraycopy(array1, 0, mergedArray, 0, array1.length);
System.arraycopy(array2, 0, mergedArray, array1.length, array2.length);

反转字符串数组

List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
Collections.reverse(stringList);
stringArray = stringList.toArray(new String[0]);

删除重复元素

Set<String> stringSet = new LinkedHashSet<>(Arrays.asList(stringArray));
String[] uniqueArray = stringSet.toArray(new String[0]);

将字符串数组转换为字符串

StringBuilder stringBuilder = new StringBuilder();
for (String s : stringArray) {
    stringBuilder.append(s).append(", ");
}
String resultString = stringBuilder.toString();

将字符串转换为字符串数组

String inputString = "apple, banana, cherry, date, elderberry";
String[] stringArray = inputString.split(", ");

替换字符串数组中的元素

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
for (int i = 0; i< stringArray.length; i++) {
    if (stringArray[i].equals("cherry")) {
        stringArray[i] = "new value";
    }
}

查找字符串数组中的最大值和最小值

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
String maxValue = Collections.max(Arrays.asList(stringArray));
String minValue = Collections.min(Arrays.asList(stringArray));

计算字符串数组中元素的总数

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
int totalCount = stringArray.length;

将字符串数组中的元素连接成一个字符串

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
StringBuilder stringBuilder = new StringBuilder();
for (String s : stringArray) {
    stringBuilder.append(s);
}
String resultString = stringBuilder.toString();

将字符串数组中的元素逆序排列

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
Collections.reverse(stringList);
stringArray = stringList.toArray(new String[0]);

将字符串数组中的元素按字母顺序排序

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
Arrays.sort(stringArray, String.CASE_INSENSITIVE_ORDER);

将字符串数组中的元素转换为大写或小写

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
for (int i = 0; i< stringArray.length; i++) {
    stringArray[i] = stringArray[i].toUpperCase();
}

将字符串数组中的元素去除空格

String[] stringArray = {"apple", "banana", "cherry", "date", "elderberry"};
for (int i = 0; i< stringArray.length; i++) {
    stringArray[i] = stringArray[i].trim();
}

将字符串数组中的元素按照指定分隔符分割成新的字符串数组

String[] stringArray = {"apple,banana", "cherry,date", "elderberry,grape"};
String[] newStringArray = new String[stringArray.length * 2];
int index = 0;
for (String s : stringArray) {
    String[] splitArray = s.split(",");
    newStringArray[index++] = splitArray[0];
    newStringArray[index++] = splitArray[1];
}

将字符串数组中的元素按照指定规则进行排序

String[] stringArray = {"apple123", "banana456", "cherry789", "date012", "elderberry345"};
Arrays.sort(stringArray, (s1, s2) -> {
    int num1 = Integer.parseInt(s1.substring(s1.length() - 3));
    int num2 = Integer.parseInt(s2.substring(s2.length() - 3));
    return Integer.compare(num1, num2);
});

将字符串数组中的元素转换为整数数组

String[] stringArray = {"1", "2", "3", "4", "5"};
int[] intArray = new int[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    intArray[i] = Integer.parseInt(stringArray[i]);
}

将整数数组转换为字符串数组

int[] intArray = {1, 2, 3, 4, 5};
String[] stringArray = new String[intArray.length];
for (int i = 0; i < intArray.length; i++) {
    stringArray[i] = String.valueOf(intArray[i]);
}

将字符串数组中的元素转换为浮点数数组

String[] stringArray = {"1.0", "2.0", "3.0", "4.0", "5.0"};
float[] floatArray = new float[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    floatArray[i] = Float.parseFloat(stringArray[i]);
}

将浮点数数组转换为字符串数组

float[] floatArray = {1.0f, 2.0f, 3.0f, 4.0f, 5.0f};
String[] stringArray = new String[floatArray.length];
for (int i = 0; i< floatArray.length; i++) {
    stringArray[i] = String.valueOf(floatArray[i]);
}

将字符串数组中的元素转换为布尔数组

String[] stringArray = {"true", "false", "true", "false", "true"};
boolean[] booleanArray = new boolean[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    booleanArray[i] = Boolean.parseBoolean(stringArray[i]);
}

将布尔数组转换为字符串数组

boolean[] booleanArray = {true, false, true, false, true};
String[] stringArray = new String[booleanArray.length];
for (int i = 0; i< booleanArray.length; i++) {
    stringArray[i] = String.valueOf(booleanArray[i]);
}

将字符串数组中的元素转换为字符数组

String[] stringArray = {"a", "b", "c", "d", "e"};
char[] charArray = new char[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    charArray[i] = stringArray[i].charAt(0);
}

将字符数组转换为字符串数组

char[] charArray = {'a', 'b', 'c', 'd', 'e'};
String[] stringArray = new String[charArray.length];
for (int i = 0; i< charArray.length; i++) {
    stringArray[i] = String.valueOf(charArray[i]);
}

将字符串数组中的元素转换为长整数数组

String[] stringArray = {"1", "2", "3", "4", "5"};
long[] longArray = new long[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    longArray[i] = Long.parseLong(stringArray[i]);
}

将长整数数组转换为字符串数组

long[] longArray = {1L, 2L, 3L, 4L, 5L};
String[] stringArray = new String[longArray.length];
for (int i = 0; i< longArray.length; i++) {
    stringArray[i] = String.valueOf(longArray[i]);
}

将字符串数组中的元素转换为双精度浮点数数组

String[] stringArray = {"1.0", "2.0", "3.0", "4.0", "5.0"};
double[] doubleArray = new double[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    doubleArray[i] = Double.parseDouble(stringArray[i]);
}

将双精度浮点数数组转换为字符串数组

double[] doubleArray = {1.0, 2.0, 3.0, 4.0, 5.0};
String[] stringArray = new String[doubleArray.length];
for (int i = 0; i< doubleArray.length; i++) {
    stringArray[i] = String.valueOf(doubleArray[i]);
}

将字符串数组中的元素转换为短整数数组

String[] stringArray = {"1", "2", "3", "4", "5"};
short[] shortArray = new short[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    shortArray[i] = Short.parseShort(stringArray[i]);
}

将短整数数组转换为字符串数组

short[] shortArray = {1, 2, 3, 4, 5};
String[] stringArray = new String[shortArray.length];
for (int i = 0; i< shortArray.length; i++) {
    stringArray[i] = String.valueOf(shortArray[i]);
}

将字符串数组中的元素转换为字节数组

String[] stringArray = {"1", "2", "3", "4", "5"};
byte[] byteArray = new byte[stringArray.length];
for (int i = 0; i< stringArray.length; i++) {
    byteArray[i] = Byte.parseByte(stringArray[i]);
}