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public static void main(String[] args) {
int count = 5;
String arr[][] = new String[count][count];
for (int i = 0; i < count; i++) {
for (int j = 0; j < count; j++) {
arr[i][j] = " ";
}
}
int line = 0;
while (line < count) {
for (int i = line; i < count; i++) {
arr[line][i] = "2";
}
++line;
}
print(arr, count);
}
public static void print (String ary[][], int cnt) {
for (int i = 0; i < cnt; i++) {
for (int j = 0; j < cnt; j++) {
System.out.print(ary[i][j]);
}
System.out.println();
}
}}
int[][] array = {{2,2,2,2,2},{2,2,2,2},{2,2,2},{2,2},{2}};
//最大长度,占位符作用
int max = array[0].length;
for(int i=0;i < array.length;i++){
for (int j = 0; j < max - array[i].length; j++) {
System.out.print(" ");
}
for (int j = 0; j < array[i].length; j++) {
System.out.print(array[i][j]);
}
System.out.println();
}
}
private static final int MAXCOL = 5;
private static final String PRINTCHAR = "2"; public static void main(String[] args) {
String array[][] = new String[MAXROW][MAXCOL];
for (int rr = 0; rr < array.length; rr++) {
for (int cc = 0; cc < array[rr].length; cc++) {
array[rr][cc] = (rr <= cc ? PRINTCHAR : " ");
System.out.print(array[rr][cc]);
}
System.out.println();
}
}
}
22222
2222
222
22
2可以通过修改程序中的常量,输出类似的三角形
public static void main(String[] args) {
for (int ii = 5; ii >= 1; ii--) {
System.out.printf("%5." + ii + "s%n", "22222");
}
}
}