examples: make main loops finite to ensure proper cleanup

Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/java/AioA0.java

@@ -44,11 +44,12 @@ public class AioA0 {
     public static void main(String[] args) {
         Aio a0 = new Aio(0);
 
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             int adc_value = a0.read();
             float adc_value_float = a0.readFloat();
             System.out.println(String.format("ADC A0 read %X - %d", adc_value, adc_value));
             System.out.println(String.format("ADC A0 read %.5f", adc_value_float));
+            Thread.sleep(500);
         }
 
     }

examples/java/BlinkIO.java

@@ -61,7 +61,7 @@ public class BlinkIO {
             System.exit(1);
         }
 
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             gpio.write(1);
             Thread.sleep(1000);
             gpio.write(0);

examples/java/BlinkOnboard.java

@@ -64,7 +64,7 @@ public class BlinkOnboard {
         }
 
         boolean state = false;
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             if (gpio_in != null && gpio_in.read() == 0) {
                 return;
             }

examples/java/CyclePwm3.java

@@ -44,7 +44,7 @@ public class CyclePwm3 {
         pwm.enable(true);
 
         float value = 0;
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             value += 0.01;
             pwm.write(value);
             Thread.sleep(50);

examples/java/FTDITest.java

@@ -50,8 +50,8 @@ public class FTDITest {
             /* Blink FTDI board LED */
             Gpio led = new Gpio(514);
             led.dir(Dir.DIR_OUT);
-            for (int i = 0;; i = (i + 1) % 2) {
-                led.write(i);
+            for (int i = 100; i > 0; --i) {
+                led.write(i % 2);
                 Thread.sleep(500);
             }
         } else {

examples/java/GpioMmapped.java

@@ -50,7 +50,7 @@ public class GpioMmapped {
     
     gpio.useMmap(true);
     
-    while (true) {
+    for (int i = 1000; i > 0; --i) {
         gpio.write(1);
         Thread.sleep(50);
         gpio.write(0);

examples/java/GpioRead6.java

@@ -46,7 +46,7 @@ public class GpioRead6 {
 
         gpio.dir(Dir.DIR_IN);
 
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             System.out.format("Gpio is %d\n", gpio.read());
             Thread.sleep(1000);
         }

examples/java/I2cCompass.java

@@ -110,7 +110,7 @@ public class I2cCompass {
         conf_buf[1] = HMC5883L_CONT_MODE;
         i2c.write(conf_buf);
 
-        while (true) {
+        for (int i = 100; i > 0; --i) {
             i2c.address(HMC5883L_I2C_ADDR);
             i2c.writeByte(HMC5883L_DATA_REG);
 

examples/java/SpiMCP4261.java

@@ -43,7 +43,7 @@ public class SpiMCP4261 {
 
         System.out.println("Hello, SPI initialised");
         byte data[] = {0x00, 100};
-        while (true) {
+        for (int cnt = 100; cnt > 0; --cnt) {
             for (int i = 90; i < 130; i++) {
                 data[1] = (byte) i;
                 byte[] recv = spi.write(data);