[英]Output one dimensional array as 2 dimensional in java
I have to output the array with a maximum of 4 array values per line, but I can't figure out how to convert it to a 2 dimensional array. 我必须输出每行最多4个数组值的数组,但是我不知道如何将其转换为二维数组。 After the dashes is where I am having trouble.
破折号之后是我遇到麻烦的地方。 If I don't output it as a 2D array, how else would I restrict it to have only 4 values per line?
如果我不将其输出为2D数组,又如何将其限制为每行只有4个值?
public class arrayExampleB{
public static void main(String[] args){
int[] x = {22, 12, 28, 4, 30, 59, 17, 82, 1, 99, 47, 2, 8, 20, 80};
System.out.print("Pre-Swapped Array Set (linear): {");
for(int i=0; i<=x.length-1; i++){
if(i<x.length-1){
System.out.print(x[i] + ", ");
}
else{System.out.print(x[i]);}
}
System.out.print("}");
int y = x.length-1;
int temp = x[y];
x[y] = x[1];
x[1] = temp;
int z = x.length-2;
int temp2 = x[z];
x[z] = x[0];
x[0] = temp2;
System.out.print("\nPost-Swapped Array Set (linear): {");
for(int i=0; i<=x.length-1; i++){
if(i<x.length-1){
System.out.print(x[i] + ", ");
}
else{System.out.print(x[i]);}
}
System.out.print("}");
//------------------------------------------------------------- // ------------------------------------------------ -------------
int d = (x.length / 4) + (x.length % 4);
int i = 0;
int j = 0;
int[][] t = new int[i][j];
System.out.print("\nPre-Swapped Array Set (2D): {");
for(i=0; i <= 4; i++){
for(j=0; j < d; j++){
System.out.print(t[i][j] + " ");
}
System.out.println();
}
System.out.print("}");
}
}
Without taking too close a look on your code: To output a one dimensional array on several lines on the console consider this: 在不仔细查看代码的情况下:要在控制台的多行上输出一维数组,请考虑以下情况:
int[] x = {22, 12, 28, 4, 30, 59, 17, 82, 1, 99, 47, 2, 8, 20, 80};
for(int i = 0; i < x.length; i++)
{
System.out.print(x[i] + ' ');
if( (i+1) % 4 == 0)
System.out.print('\n');
}
int[] x = {22, 12, 28, 4, 30, 59, 17, 82, 1, 99, 47, 2, 8, 20, 80};
int[][] t = new int[4][4];
// populate 2D
int k = 0
for(i=0; i <= t.length; i++){
for(j=0; j < t[i].length; j++){
t[i][j] = x[k];
k++l
}
}
// print
for(i=0; i <= t.length; i++){
System.out.print("{");
for(j=0; j < t[i].length; j++){
System.out.print(t[i][j]);
}
System.out.println("}");
}
To output a 1d array as 2d with a max of 4 values on a line, use this code: 要将1d数组输出为2d,一行中最多包含4个值,请使用以下代码:
for (int i = 0; i < array.length; i++) {
System.out.print(array[i] + " ");
if ((i+1) % 4 == 0)
System.out.println();
}
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