java编程用啥软件_java编程要用什么软件[通俗易懂]

第一题：

package com.mtv.test;

public class TestMain {

public static void printFor(int i){

int m,n,j;

for(j=1;j<=i;j++){

for(m=0;m<9-j;m++){

System.out.print(” “);

}

for(n=1;n<=j;n++){

System.out.print(n+” “);

}

for(n=j-1;n>0;n–){

System.out.print(n+” “);

}

System.out.println();

}

}

public static void printRe(int i){

int m,n;

if(i==0){

// for(m=0;m<8;m++){

// System.out.print(” “);

// }

// System.out.println(i);

}else{

printRe(i-1);//递归调用

for(m=0;m<9-i;m++){

System.out.print(” “);

}

for(n=1;n<=i;n++){

System.out.print(n+” “);

}

for(n=i-1;n>0;n–){

System.out.print(n+” “);

}

System.out.println();

}

}

public static void main(String[] args){

TestMain.printFor(9);

TestMain.printRe(9);

}

}

第二题：

public class TestM {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

int[][] num = new int[12][];

num[0] = new int[1];

num[1] = new int[2];

num[0][0] = 1;

num[1][0] = num[1][1] = 1;

for(int row=2;row<12;row++){

num[row] = new int[row+1];

num[row][0] = num[row][row] =1;

for(int n=1;n

num[row][n]=num[row-1][n-1]+num[row-1][n];

}

}

for(int m=0;m

for(int n=0;n

System.out.print(num[m][n]+” “);

}

System.out.println();

}

}

}

取消

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