java - 在java中将String转换为整数数组

Question

概述 Java 程序如何将诸如“1,2,3,4,5”之类的字符串转换为数组 ({1, 2, 3, 4,5})

Answer 1

来自 zvzdhk：

String[] array = "1,2,3,4,5".split(",");

然后，解析你的整数：

int[] ints = new int[array.length];
for(int i=0; i<array.length; i++)
{
    try {
        ints[i] = Integer.parseInt(array[i]);           
    } catch (NumberFormatException nfe) {
        //Not an integer 
    }
}

Answer 2

试试这个：

String[] array = "1,2,3,4,5".split(",");
int[] result = new result[array.length];
for (int i = 0; i < array.length; i++) {
    try {
         result[i] = Integer.parseInt(array[i]);
    } catch (NumberFormatException nfe) {};
}

Answer 3

使用 StringTokenizer 它将用逗号分割字符串，然后将这些值/标记放入整数数组中。

public static int[] getIntegers(String numbers) {
    StringTokenizer st = new StringTokenizer(numbers, ",");
    int[] intArr = new int[st.countTokens()];
    int i = 0;
    while (st.hasMoreElements()) {
        intArr[i] = Integer.parseInt((String) st.nextElement());
        i++;
    }
    return intArr;
}

Answer 4

String [] str = "1,2,3,4,5".split(",");
int arrayInt[] = new int[str.length];
for (int i = 0; i < str.length; i++) 
    arrayInt[i]=Integer.valueOf(str[i]);

Answer 5

使用 Guava，您可以在一行中做到这一点：

int[] array = Ints.toArray(Lists.newArrayList(Ints.stringConverter().convertAll(Splitter.on(",").split("1,2,3,4,5"))));

左右（如果你不需要数组）：

Iterable<Integer> ints = Ints.stringConverter().convertAll(Splitter.on(",").split("1,2,3,4,5"));