我正在使用 gradle 来构建和运行一个要求用户输入单词的 java 项目，当键入“done”时，程序会打印一个排序的字符串列表。
当我使用命令 gradle -build 构建项目时，它是成功构建的，但是当我尝试运行它时，看起来 Gradle 没有“让我有时间”输入一个单词，然后 Gradle 告诉我“没有行成立”。
这是我的 java 程序中函数 void enter_words() 的摘录：
System.out.println("Enter a word");
str=sc.nextLine();
这是我在 shell 中使用 gradle run 命令时 Gradle 告诉我的内容：
C:\Users\celine\Desktop\test2>gradle run
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:runMain
Enter a word // the program is running but I can't enter a word
Exception in thread "main" java.util.NoSuchElementException: No line found
at java.util.Scanner.nextLine(Scanner.java:1585)
at d.Project1.enter_words(Project1.java:42)
at d.Project1.main(Project1.java:81)
:runMain FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':runMain'.
> Process 'command 'C:\Program Files\Java\jdk1.7.0_40\bin\java.exe'' finished wi
th non-zero exit value 1
这是我的java程序：
package com.gumgum.test;
import java.util.Arrays;
import java.util.Scanner;
import org.apache.commons.lang.StringUtils;
public class Project1 {
private int max;
private String[] userInputs;
// constructors
public Project1() {
max=100;
userInputs = new String[max];
}
public Project1(int n) {
max=n;
userInputs = new String[max];
}
//getter
String[] getUserInputs() {
return userInputs;
}
//setter: all words entered by the users are written in tab
public void setUserInputs(String[] tab, int position, String str) {
tab[position]=str;
}
//demande à l'utilisateur d'entrer un mot
public void enter_words () {
Scanner sc = new Scanner(System.in);
int countWords=0;
String str="";
while ((countWords<3) || (str.equals("done")!=true)) {
System.out.println("Enter a word");
str=sc.nextLine();
if (StringUtils.isBlank(str) == true)
System.out.println("Please enter a valid word");
else if (str.length()<=2)
System.out.println("Please enter at least 3 characters");
if ((str.length()>=3) && (StringUtils.isBlank(str) != true)) {
switch(str) {
case "done" :
if (countWords<3)
System.out.println("Please enter at least three words");
break;
default:
setUserInputs(this.userInputs,countWords,str);
countWords++;
break;
}
}
}
}
public void lexico_order(String[] tab) {
int i=0;
System.out.println("");
while(tab[i]!=null) {
i++;
}
int k=0;
Arrays.sort(tab, k, i);
System.out.println("****** Sorted String List *******");
for (int j=0;j<i;j++)
System.out.println(tab[j]);
}
public static void main(String[] args) {
Project1 p;
p = new Project1();
p.enter_words();
System.out.printf("ca marche");
p.lexico_order(p.getUserInputs());
}
}