Java 如何在一行中打印数组的结果？
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原文地址: http://stackoverflow.com/questions/16564505/
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How to print the results of an array in a single line?
提问by Cleiton Lima
I would like to know if anybody could help me to understand why my array result does not come in one single line. The results of the code below is printed as:
我想知道是否有人可以帮助我理解为什么我的数组结果没有出现在一行中。下面代码的结果打印为：
[
1
2
3
4
5
6
7
8
9
10
]
Instead of [1 2 3 4 5 6 7 8 9 10].
而不是[1 2 3 4 5 6 7 8 9 10].
Any thoughts on what I am doing wrong to the results not come in on line?
关于我做错了什么的任何想法都没有上线？
class RangeClass {
int[] makeRange(int lower, int upper) {
int arr[] = new int[ (upper - lower) + 1 ];
for(int i = 0; i < arr.length; i++) {
arr[i] = lower++;
}
return arr;
}
public static void main(String arguments[]) {
int theArray[];
RangeClass theRange = new RangeClass();
theArray = theRange.makeRange(1, 10);
System.out.println("The array: [ ");
for(int i = 0; i< theArray.length; i++) {
System.out.println(" " + theArray[i] + " ");
}
System.out.println("]");
}
}
回答by DeadlyJesus
Replace System.out.printlnby System.out.printlike this:
替换System.out.println成System.out.print这样：
System.out.print("The array: [ ");
for(int i = 0; i< theArray.length; i++) {
System.out.print(" " + theArray[i] + " ");
}
System.out.println("]");
printlnadd a line separator at the end of what you just printed.
println在刚刚打印的内容的末尾添加一个行分隔符。
回答by Juned Ahsan
Use System.out.print instead of System.out.println
使用 System.out.print 而不是 System.out.println
回答by Adam Stelmaszczyk
You can use shorter version:
您可以使用较短的版本：
int theArray[] = {1, 2, 3};
System.out.println(java.util.Arrays.toString(theArray));
回答by roger_that
System.out.printlnchanges the line after printing the statement. That is why, your array elements are not coming in one line.
Try using System.out.printinstead and that would do the trick.
System.out.println在打印语句后更改行。这就是为什么你的数组元素不是在一行中。尝试使用System.out.print代替，这样就可以了。
回答by Azad
for(int i = 0 ; i < theArray.length;i++){
if(i==0)
System.out.print("["+theArray[i]);
else if(i==theArray.length-1)
System.out.print(","+theArray[i]+"]");
else
System.out.print(","+theArray[i]);
}
Output :(for example)
输出：（例如）
[1,2,5,3,7]
[1,2,5,3,7]
回答by Kunal Kishore
Use System.out.print() at the place of System.out.println() in all the code because if you use System.out.println() a new line character is getting printed after our output on console each time it is called but if you use System.out.print() it will print what you are passing it as parameter. So Change your code to
在所有代码中在 System.out.println() 的位置使用 System.out.print() 因为如果您使用 System.out.println() 每次我们在控制台上的输出之后都会打印一个换行符调用但如果您使用 System.out.print() 它将打印您作为参数传递的内容。所以将您的代码更改为
class RangeClass {
int[] makeRange(int lower, int upper) {
int arr[] = new int[ (upper - lower) + 1 ];
for(int i = 0; i < arr.length; i++) {
arr[i] = lower++;
}
return arr;
}
public static void main(String arguments[]) {
int theArray[];
RangeClass theRange = new RangeClass();
theArray = theRange.makeRange(1, 10);
System.out.print("The array: [ ");
for(int i = 0; i< theArray.length; i++) {
System.out.print(" " + theArray[i] + " ");
}
System.out.print("]");
}
}
回答by Kangkan Lahkar
int []arr = {3, 4, 1, 7, 8, 5, 4, 11, 33, 21, 17, 15};
int []arr = {3, 4, 1, 7, 8, 5, 4, 11, 33, 21, 17, 15};
System.out.print(Arrays.toString(arr).replace("[","").replace("]", "").replace(",", ""));
System.out.print(Arrays.toString(arr).replace("[","").replace("]", "").replace(",", ""));
回答by Jad Chahine
You can do this in one line using Java 8
您可以使用Java 8在一行中完成此操作
Assume you have this list of integers
假设你有这个整数列表
List<Integer> lst = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8 ,9);
You can print all the items in one shot in this way
您可以通过这种方式一次性打印所有项目
lst.forEach(nb -> System.out.print(nb + " "));
Or in this way
或者以这种方式
lst.forEach(System.out::print);
Result
结果
1 2 3 4 5 6 7 8 9
回答by Pranav
Just make one small change to your code:
只需对您的代码进行一个小的更改：
class ArrayDemo {
int[] makeRange(int lower, int upper) {
int arr[] = new int[ (upper - lower) + 1 ];
for(int i = 0; i < arr.length; i++) {
arr[i] = lower++;
}
return arr;
}
public static void main(String arguments[]) {
int theArray[];
ArrayDemo theRange = new ArrayDemo();
theArray = theRange.makeRange(1, 10);
System.out.print("The array: [ "); //Remove println here
for(int i = 0; i< theArray.length; i++) {
System.out.print(" " + theArray[i] + " "); //Same here
}
System.out.println("]");
}
}
Output array: [ 1 2 3 4 5 6 7 8 9 10 ]
输出数组： [ 1 2 3 4 5 6 7 8 9 10 ]
