public static void main(String[] args) {
int[][] triarray = new int[10][];
int i = 0, j = 0;
for (int[] triarray2 : triarray) {
triarray2 = new int[++i];
}
for (int[] triarray2 : triarray) {
System.out.println(triarray2);
}
}
]]>
閭ｄ箞涓嬮潰鐨勭▼搴忛棶棰樺張鍦ㄥ摢閲屽憿錛燂紵
public class trigon{
public static void main(String[] args){
int[][] triarray=new int[10][];
int i=0,j=0;
for(int[] triarray2:triarray){
triarray2=new int[++i];
}
for(int[] triarray2:triarray){
for(int tri:triarray2){
triarray2[j++]=j+1;
System.out.println(triarray2+"");
}
System.out.println("");
}
}
}
]]>
鐢ㄤ笅闈㈢殑浠ｇ爜灝辮浜嗭紝鎴戞兂涓嶄細姣擟瑕佸鏉傘?br>
public static void main(String[] args) {
int[][] triarray = new int[10][];
for (int i = 0; i < triarray.length; i++) {
triarray[i] = new int[i + 1];
}
for (int i = 0, k = 1; i < triarray.length; i++) {
for (int j = 0; j < triarray[i].length; j++) {
triarray[i][j] = k++;
}
}
for (int i = 0; i < triarray.length; i++) {
for (int j = 0; j < triarray[i].length; j++) {
System.out.printf("%2d ", triarray[i][j]);
}
System.out.println();
}
}
]]>
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
...........................
]]>
public class trigon2{
public static void main(String[] args){
int[][] triarray=new int[10][];
for(int i=0;i<triarray.length;i++){
triarray[i]=new int[++i];
.....
鎶婅繖閲宼riarray[i]=new int[++i];鏀規垚triarray[i]=new int[i+1];
浣嗘槸榪欐槸涓棤闄愬驚鐜紝鍥犱負
for(int i=0;i<triarray.length;i++){
for(int j=0;j<triarray[i].length;j++){
j=0;
triarray[i][j]=++k;
System.out.println(triarray[i][j]);
}
}
鍦ㄥ唴寰幆浣犳瘡嬈″張鎶妀=0, j<triarray[i].length褰撶劧涓鐩存槸true浜嗐?br>
鑷充簬浣犵湅鍒扮殑
//Exception in thread "main" java.lang.NullPointerException
// at trigon2.main(trigon2.java:9)
寮傚父錛屾槸鍥犱負鍦ㄧ涓涓猣or寰幆閲岋紝浣犲彧鍒濆鍖栦簡triarray[0],triarray[2],...
triarray[1],triarray[3]閮借繕娌℃湁琚垵濮嬪寲錛屽綋鐒朵細鏈塏ullPointerException銆?br>
]]>