Question

正如您在下面的代码中看到的，myEntries是一个包含字符串数组的列表。它有以下数据。

[TestSoftware，Test Sample，AutoTestSoftware11,1，Concept，Large，java，Medium]

[TestSoftware，Test Sample，AutoTestSoftware12,1，End of Life，Very Large，java，High]

[TestSoftware，Test Sample，AutoTestSoftware13,1，Concept，Large，java，Low]

[TestSoftware，Test Sample，AutoTestSoftware14,1，Concept，Large，java，Critical]

我的目标是，如您所见，我希望从AutoTestSoftware11等字符串中获取数字，并将8添加到该数字。同样，我想将整个String Array推回到myEntries中。我也发布了输出。我面临的问题是，只有最后更改的值反映在myEntries中。

List<String[]> myEntries;
String[] world = new String[8];
int t=0;

for (String[] element:myEntries) {
                k=0;
                for (String temp:element) {

                    if (temp.startsWith("AutoTestSoftware")) {
                        int hi = Integer.parseInt(temp.split("AutoTestSoftware(?=\\d)")[1]);
                        hi += 8;
                        temp = "AutoTestSoftware" + hi;
                    }
                    world[k]=temp;
                    k++;
                }
                System.out.println(Arrays.toString(world)+"value of t: "+t);
                myEntries.set(t,world);
                t++;
            }
            System.out.println("\n\n");
            for (String[] element2 : myEntries)
            {
              System.out.println(Arrays.toString(element2));
            }

输出：

[TestSoftware，Test Sample，AutoTestSoftware19,1，Concept，Large，java，Medium]值t：0

[TestSoftware，Test Sample，AutoTestSoftware20,1，End of Life，Very Large，java，High]值t：1

[TestSoftware，Test Sample，AutoTestSoftware21,1，Concept，Large，java，Low]值t：2

[TestSoftware，Test Sample，AutoTestSoftware22,1，Concept，Large，java，Critical]值t：3

[TestSoftware，Test Sample，AutoTestSoftware22,1，Concept，Large，java，Critical]

Answer 1

要解释我的评论，这有效：

List<String[]> myEntries;

int t=0;

for (String[] element:myEntries) {
                k=0;
                String[] world = new String[8];
                for (String temp:element) {

                    if (temp.startsWith("AutoTestSoftware")) {
                        int hi = Integer.parseInt(temp.split("AutoTestSoftware(?=\\d)")[1]);
                        hi += 8;
                        temp = "AutoTestSoftware" + hi;
                    }
                    world[k]=temp;
                    k++;
                }
                System.out.println(Arrays.toString(world)+"value of t: "+t);
                myEntries.set(t,world);
                t++;
            }
            System.out.println("\n\n");
            for (String[] element2 : myEntries)
            {
              System.out.println(Arrays.toString(element2));
            }

无法将值设置为列表仅替换

1 个答案: