数组Java从主函数调用print方法并使用另一个单独方法的数据
我试图运行一个程序,从用户输入构建一个2D数组,然后打印数组。数组必须用一种方法构造,并用另一种方法打印行。我只想把数组中的每一行打印到一行。我不知道如何将数组从一个方法拉到另一个方法
代码的设置是这样的,当调用main
方法时,它将调用“构造函数”方法来构建数组,然后在构建数组之后,它将获取该数组,并将数据发送到打印方法来打印每一行。我不确定从代码中的位置出发,我仍然不知道如何从不同的方法中提取数据
package workfiles;
import java.util.*;
import java.util.Scanner;
public class hw2
{
// Do not modify this method
public static void main(String[] args)
{
try {
int[][] iArray = enter2DPosArray();
System.out.println("The original array values:");
print2DIArray(iArray);
int[][] tArray = transposition(iArray);
System.out.println("The transposed array values:");
print2DIArray(tArray);
} catch (InputMismatchException exception) {
System.out.println("The array entry failed. The program will now halt.");
}
}
// A function that prints a 2D integer array to standard output
// THIS METHOD IS THE ONE THAT IS SUPOSED TO PRINT THE ROWS ON NEW LINES
public static void print2DIArray(int[][] output)
{
int[][] iArray;
for (int row = 0; row < iArray.length; row++) {
for (int column = 0; column < iArray[row].length; column++) {
System.out.print(iArray[row][column] + " ");
}
System.out.println();
}
}
// A function that enters a 2D integer array from the user
// It raises an InputMismatchException if the user enters anything other
// than positive (> 0) values for the number of rows, the number of
// columns, or any array entry
public static int[][] enter2DPosArray() throws InputMismatchException
{
int row = 0, col = 0, arow = 0, acol = 0, holder;
Scanner numScan = new Scanner(System.in);
while (row <= 0) {
System.out.print("How many rows (>0) should the array have? ");
row = numScan.nextInt();
}
while (col <= 0) {
System.out.print("How many columns (>0) should the array have? ");
col = numScan.nextInt();
}
int[][] iArray = new int[row][col];
while (arow < row) {
while (acol < col) {
System.out.println("Enter a positive (> 0) integer value: ");
holder = numScan.nextInt();
iArray[arow][acol] = holder;
acol++;
}
if (acol >= col) {
acol = 0;
arow ++;
}
}
//arrayName[i][j]
numScan.close();
return iArray;
}
public static int[][] transposition(int[][] iArray)
{
int r = 0, c = 0;
int[][] transpose = new int[r][c];
for (int i = 0; i < r; i++) {
for (int j = 0; j < c; j++) {
transpose[i][j] = iArray[j][i];
}
}
return transpose;
}
}
# 1 楼答案
您可以这样更改方法中的名称:
所以你的代码应该是这样的