public class Main01{

public static void main(String[] args) {

Main01.java_flow_control();

}

private static void java_flow_control() {

System.out.println("\n#java_flow_control");

System.out.println("##if-else if-else");

double x = 233.1;

if (Math.abs(x - 233) <= 1e-3) {

System.out.println("abs(x-233) <= 1e-3");

} else if (x > 233 + 1e-3) {

System.out.println("x > 233+1e-3");

} else {

System.out.println("x < 233-1e-3");

}

System.out.println("##switch-case-default");

int x1 = 1;

switch (x1) {

case 0:

System.out.println("x1==0");

case 1:

case 2:

System.out.println("x1==1");

default:

System.out.println("default");

}

System.out.println("##while");

int x2 = 3;

while (x2 < 5) {

System.out.printf("x2 = %d\n", x2);

x2++;

}

do {

System.out.printf("x2 = %d\n", x2);

x2--;

} while (x2 > 2);

System.out.println("##for");

int[] x3 = { 1, 4, 9 };

for (int i = 0; i < x3.length; i++) {

System.out.printf("i = %d\n", i);

}

for (int x4 : x3) {

System.out.printf("x = %d\n", x4);

}

}

}