二维阵列，螺旋图案构建。类型2：外进。
/* from N o w J a v a . c o m*/ import java.util.Scanner; /** * Engineered and developed by Jhonny Trejos Barrios. * Technology: Java. * Version: Java Development Kit 1.8.0_31, Standard Edition. * Development Environment: Sublime Text 3. * Additional Info. * * Source Code Target: * * BIDIMENSIONAL ARRAY, SPIRAL PATTERN BUILD. TYPE 2: OUT-IN. * * Licenses: GNU GPL v3.0, Eclipse Public License 1.0, personal not for commercial purposes. * Developer Contact: jtrejosb@live.com || jtrejosb@gmail.com || jtrejosb@icloud.com * Mobile: --. */ public class Pattern2 { public static void main( String[] args ) { System.out.print( "Array Size: " ); new Pattern2().printPattern( new Scanner( System.in ).nextInt() ); } public void printPattern( int size ) { int[][] array = new int[ size ][ size ]; int x = 0, y = -1; boolean left = false, right = true, down = false; //N o w J a v a . c o m - 时 代 Java 提供 for( int k = 1; k <= Math.pow( array.length, 2 ); k++ ) { if( left ) { y --; if( y == -1 ) { y = 0; x --; left = false; } else { if( array[ x ][ y ] != 0 ) { y ++; x --; left = false; } } } else { if( right ) { y ++; if( y == array.length ) { y = array.length - 1; x ++; right = false; down = true; } else { if( array[ x ][ y ] != 0 ) { y --; x ++; right = false; down = true; } } } else { if( down ) { x ++; if( x == array.length ) { x = array.length - 1; y --; down = false; left = true; } else { if( array[ x ][ y ] != 0 ) { y --; x --; down = false; left = true; } } } else { x --; if( x == -1 ) { x ++; y ++; right = true; } else {